Arid West Final Draft - United States Army...Agrostis hendersonii A.S. Hitchc. FACW Henderson's Bent...
Transcript of Arid West Final Draft - United States Army...Agrostis hendersonii A.S. Hitchc. FACW Henderson's Bent...
ARID WEST FINAL DRAFT RATINGS
US ARMY CORPS OF ENGINEERS, COLD REGIONS RESEARCH AND ENGINEERING LABORATORY (CRREL)
Scientific Name Authorship Draft Final Common Name
Abies amabilis (Dougl. ex Loud.) Dougl. ex Forbes FACU Pacific Silver Fir
Abies bifolia A. Murr. FACU Rocky Mountain Alpine Fir
Abies grandis (Dougl. ex D. Don) Lindl. FACU Grand Fir
Abies lasiocarpa (Hook.) Nutt. FACU Subalpine Fir
Acacia farnesiana (L.) Willd. FACU Mealy Wattle
Acacia greggii Gray FACU Long‐Flower Catclaw
Acanthomintha ilicifolia (Gray) Gray FAC San Diego Thorn‐Mint
Acer circinatum Pursh FAC Vine Maple
Acer glabrum Torr. FAC Rocky Mountain Maple
Acer grandidentatum Nutt. FACU Canyon Maple
Acer macrophyllum Pursh FAC Big‐Leaf Maple
Acer negundo L. FACW Ash‐Leaf Maple
Acer saccharinum L. FAC Silver Maple
Acer saccharum Marsh. FACU Sugar Maple
Achillea millefolium L. FACU Common Yarrow
Achnatherum diegoense (Swallen) Barkworth FACW San Diego Rice Grass
Achnatherum nelsonii (Scribn.) Barkworth FACU Nelson's Rice Grass
Achyrachaena mollis Schauer FAC Blow‐Wives
Aconitum columbianum Nutt. FACW Columbian Monkshood
Aconitum infectum Greene FACW Arizona Monkshood
Aconogonon phytolaccifolium (Meisn. ex Small) Small FAC Alpine Fleeceflower
Acorus americanus (Raf.) Raf. OBL Several‐Vein Sweetflag
Acorus calamus L. OBL Single‐Vein Sweetflag
Actaea rubra (Ait.) Willd. FAC Red Baneberry
Adiantum aleuticum (Rupr.) Paris FAC Aleutian Maidenhair
Adiantum capillus‐veneris L. FACW Southern Maidenhair
Adiantum jordanii C. Muell. FAC California Maidenhair
Adoxa moschatellina L. FAC Muskroot
Aegopodium podagraria L. FAC Bishop's Goutweed
Agalinis tenuifolia (Vahl) Raf. FACW Slender‐Leaf False Foxglove
Agastache urticifolia (Benth.) Kuntze FACU Nettle‐Leaf Giant‐Hyssop
Ageratina adenophora (Spreng.) King & H.E. Robins. FACU Crofton Weed
Agoseris aurantiaca (Hook.) Greene FAC Orange‐Flower Goat‐Chicory
Agoseris glauca (Pursh) Raf. FACU Pale Goat‐Chicory
Agoseris monticola Greene FAC
Agoseris parviflora (Nutt.) D. Dietr. FACU Small‐Flower Goat‐Chicory
Agoseris X agrestis Osterhout (pro sp.) FAC
Agoseris X elata (Nutt.) Greene FAC
Agrimonia gryposepala Wallr. FAC Tall Hairy Grooveburr
Agrimonia striata Michx. FACU Woodland Grooveburr
Agrostis capillaris L. FAC Colonial Bent
Agrostis elliottiana J.A. Schultes FACU Elliott's Bent
Agrostis exarata Trin. FACW Spiked Bent
Agrostis gigantea Roth FACW Black Bent
Agrostis hendersonii A.S. Hitchc. FACW Henderson's Bent
Agrostis hyemalis (Walt.) B.S.P. FACW Winter Bent
Agrostis idahoensis Nash FACW Idaho Bent
Agrostis mertensii Trin. FACU Northern Bent
Agrostis microphylla Steud. FACW Small‐Leaf Bent
Agrostis oregonensis Vasey FACW Oregon Bent
Agrostis pallens Trin. FACU Seashore Bent
Agrostis pauzhetica Probatova FACU Thermal Bent
Agrostis perennans (Walt.) Tuckerman FAC Upland Bent
Agrostis rossiae Vasey FAC Ross' Bent
Agrostis scabra Willd. FAC Rough Bent
Agrostis stolonifera L. FACW Spreading Bent
Ailanthus altissima (P. Mill.) Swingle FACU Tree‐of‐Heaven
Aira caryophyllea L. FACU Common Silver‐Hair Grass
Alhagi maurorum Medik. FAC Camelthorn
Aliciella pinnatifida (Nutt. ex Gray) J.M. Porter FACU Sticky Cheat Gily‐Flower
Alisma gramineum Lej. OBL Narrow‐Leaf Water‐Plantain
Alisma lanceolatum Withering OBL Lance‐Leaf Water‐Plantain
Alisma subcordatum Raf. OBL American Water‐Plantain
Alisma triviale Pursh OBL Northern Water‐Plantain
Allenrolfea occidentalis (S. Wats.) Kuntze FACW Iodinebush
Alliaria petiolata (Bieb.) Cavara & Grande FACU Garlic‐Mustard
Allium bisceptrum S. Wats. FACU Aspen Onion
Allium cernuum Roth FACU Nodding Onion
Allium douglasii Hook. FAC Douglas' Onion
Allium geyeri S. Wats. FACU Geyer's Onion
Allium hickmanii Eastw. FACU Hickman's Onion
Allium hyalinum Curran FACU Glassy Onion
Allium lemmonii S. Wats. FACU Claybank Onion
Allium madidum S. Wats. OBL Swamp Onion
Allium schoenoprasum L. FACW Wild Chives
Allium validum S. Wats. OBL Tall Swamp Onion
Allium vineale L. FACU Crow Garlic
Allolepis texana (Vasey) Söderstrom & Decker FAC Texas‐Salt
Allophyllum gilioides (Benth.) A.& V. Grant FAC Dense False Gily‐Flower
Almutaster pauciflorus (Nutt.) A.& D. Löve FACW Marsh‐Aster
Alnus glutinosa (L.) Gaertn. FACW European Alder
Alnus incana (L.) Moench FACW Speckled Alder
Alnus oblongifolia Torr. FACW Arizona Alder
Alnus rhombifolia Nutt. FACW White Alder
Alnus rubra Bong. FACW Red Alder
Alnus viridis (Chaix) DC. FACW Sitka Alder
Alopecurus aequalis Sobol. OBL Short‐Awn Meadow‐Foxtail
Alopecurus arundinaceus Poir. FAC Creeping Meadow‐Foxtail
Alopecurus carolinianus Walt. FACW Tufted Meadow‐Foxtail
Alopecurus geniculatus L. OBL Marsh Meadow‐Foxtail
Alopecurus magellanicus Lam. FACW Alpine Meadow‐Foxtail
Alopecurus myosuroides Huds. FACW Slender Meadow‐Foxtail
Alopecurus pratensis L. FACW Field Meadow‐Foxtail
Alopecurus saccatus Vasey OBL Pacific Meadow‐Foxtail
Alternanthera philoxeroides (Mart.) Griseb. OBL Alligator‐Weed
Amaranthus acanthochiton Sauer FACU Greenstripe
Amaranthus albus L. FACU Tumbleweed
Amaranthus arenicola I.M. Johnston FACU Sandhill Amaranth
Amaranthus blitoides S. Wats. FACW Mat Amaranth
Amaranthus blitum L. FAC Purple Amaranth
Amaranthus californicus (Moq.) S. Wats. FACW California Amaranth
Amaranthus crassipes Schlecht. FAC Spreading Amaranth
Amaranthus obcordatus (Gray) Standl. FACU Trans‐Pecos Amaranth
Amaranthus palmeri S. Wats. FACU Careless Weed
Amaranthus retroflexus L. FACU Red‐Root
Amaranthus spinosus L. FACU Spiny Amaranth
Amaranthus tuberculatus (Moq.) Sauer FACW Rough‐Fruit Amaranth
Amaranthus viridis L. FAC Slender Amaranth
Amaranthus watsonii Standl. FACW Watson's Amaranth
Amblyopappus pusillus Hook. & Arn. FACW Dwarf Coastweed
Ambrosia artemisiifolia L. FACU Annual Ragweed
Ambrosia psilostachya DC. FACU Perennial Ragweed
Ambrosia pumila (Nutt.) Gray FACU Dwarf Burr‐Ragweed
Ambrosia trifida L. FAC Great Ragweed
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roemer FACU Saskatoon Service‐Berry
Amelanchier utahensis Koehne FACU Utah Service‐Berry
Amerorchis rotundifolia (Banks ex Pursh) Hultén OBL Round‐Leaf Orchid
Ammannia auriculata Willd. OBL Eared Redstem
Ammannia coccinea Rottb. OBL Valley Redstem
Ammannia robusta Heer & Regel OBL Grand Redstem
Ammophila arenaria (L.) Link FACU European Beach Grass
Ammophila breviligulata Fern. FACU American Beach Grass
Amorpha californica Nutt. FAC California Indigo‐Bush
Amorpha fruticosa L. FACW False Indigo‐Bush
Amorpha nana Nutt. FACU Fragrant Indigo‐Bush
Amsinckia spectabilis Fisch. & C.A. Mey. FACU Woolly‐Breeches
Andromeda polifolia L. OBL Bog‐Rosemary
Andropogon gerardii Vitman FACU Big Bluestem
Andropogon glomeratus (Walt.) B.S.P. FACW Bushy Bluestem
Andropogon virginicus L. FAC Broom‐Sedge
Androsace chamaejasme Wulfen FACU Sweet‐Flower Rock‐Jasmine
Androsace filiformis Retz. FACW Slender‐Stem Rock‐Jasmine
Androsace occidentalis Pursh FACU Western Rock‐Jasmine
Androsace septentrionalis L. FACU Pygmy‐Flower Rock‐Jasmine
Anemone canadensis L. FAC Round‐Leaf Thimbleweed
Anemone narcissiflora L. FAC Narcissus‐Flower Thimbleweed
Anemone oregana Gray FACU Blue Windflower
Anemone parviflora Michx. FACW Small‐Flower Thimbleweed
Anemone piperi Britt. ex Rydb. FACU Piper's Windflower
Anemopsis californica (Nutt.) Hook. & Arn. OBL Yerba‐Mansa
Angelica ampla A. Nels. FACW Giant Angelica
Angelica arguta Nutt. FACW Lyall's Angelica
Angelica dawsonii S. Wats. FACW Dawson's Angelica
Angelica genuflexa Nutt. FACW Kneeling Angelica
Angelica kingii (S. Wats.) Coult. & Rose FACW Basin Angelica
Angelica lucida L. FAC Seacoast Angelica
Angelica pinnata S. Wats. FACW Small‐Leaf Angelica
Anoda cristata (L.) Schlecht. FAC Crested Anoda
Antennaria alpina (L.) Gaertn. FACU Alpine Pussytoes
Antennaria arcuata Cronq. FACW Meadow Pussytoes
Antennaria corymbosa E. Nels. FAC Flat‐Top Pussytoes
Antennaria media Greene FAC Rocky Mountain Pussytoes
Antennaria neglecta Greene FACU Field Pussytoes
Antennaria pulchella Greene FAC Sierran Pussytoes
Antennaria pulcherrima (Hook.) Greene FACU Showy Pussytoes
Antennaria umbrinella Rydb. FACU Brown‐Bract Pussytoes
Anthemis cotula L. FACU Stinking Chamomile
Anthoxanthum odoratum L. FAC Large Sweet Vernal Grass
Anticlea elegans (Pursh) Rydb. FACU Mountain False Deathcamas
Anticlea occidentalis (Gray) Zomlefer & Judd FACW Western False Deathcamas
Anticlea vaginata Rydb. FAC Sheathed False Deathcamas
Anticlea virescens (Kunth) Rydb. FACU Green False Deathcamas
Antigonon leptopus Hook. & Arn. FAC Queen's‐Jewels
Apium nodiflorum (L.) Lag. OBL European Marshwort
Apocynum cannabinum L. FAC Indian‐Hemp
Aponogeton distachyos L. f. OBL Cape‐Pondweed
Aptenia cordifolia (L. f.) Schwant. FAC Heart‐Leaf‐Iceplant
Aquilegia caerulea James FACU Colorado Blue Columbine
Aquilegia chrysantha Gray FAC Golden Columbine
Aquilegia eximia Van Houtte ex Planch. OBL Van Houtte's Columbine
Aquilegia formosa Fisch. ex DC. FAC Crimson Columbine
Aquilegia longissima Gray ex. S. Wats. FACW Long‐Spur Columbine
Arabidopsis lyrata (L.) O'Kane & Al‐Shehbaz FACU Lyre‐Leaf Thalecress
Arabis crucisetosa Constance & Rollins FAC Cross‐Hair Eared Rockcress
Arabis eschscholtziana Andrz. FACU Pacific‐Coast Eared Rockcress
Arabis goodrichii Welsh FACU Goodrich Eared Rockcress
Arabis hirsuta (L.) Scop. FACU Hairy Eared Rockcress
Aralia californica S. Wats. FACW California Spikenard
Aralia nudicaulis L. FACU Wild Sarsaparilla
Aralia racemosa L. FAC American Spikenard
Arctium minus (Hill) Bernh. FACU Lesser Burrdock
Arctostaphylos rubra (Rehd. & Wilson) Fern. FAC Red Manzanita
Arctostaphylos uva‐ursi (L.) Spreng. FACU Red Bearberry
Arenaria lanuginosa (Michx.) Rohrb. FACU Spreading Sandwort
Arenaria paludicola B.L. Robins. OBL Marsh Sandwort
Arenaria serpyllifolia L. FACU Thyme‐Leaf Sandwort
Argentina anserina (L.) Rydb. OBL Common Silverweed
Arida arizonica (R.C. Jackson & R.R. Johnson) D. Morgan & FACU Common Desert Tansy‐Aster
Arida carnosa OBL Shrubby Alkali Desert Tansy‐Aster
Aristida dichotoma Michx. FACU Church‐Mouse Three‐Awn
Armeria maritima Willd. FACU Sea Thrift
Arnica chamissonis Less. FACW Leafy Leopardbane
Arnica fulgens Pursh FACU Shining Leopardbane
Arnica lanceolata Nutt. FACW Lance‐Leaf Leopardbane
Arnica latifolia Bong. FAC Daffodil Leopardbane
Arnica longifolia D.C. Eat. FACW Spear‐Leaf Leopardbane
Arnica mollis Hook. FAC Cordilleran Leopardbane
Arnica ovata Greene FACW Sticky‐Leaf Leopardbane
Artemisia biennis Willd. FACW Biennial Wormwood
Artemisia cana Pursh FACU Coaltown Sagebrush
Artemisia douglasiana Bess. ex Hook. FAC Douglas' Wormwood
Artemisia ludoviciana Nutt. FACU White Sagebrush
Artemisia norvegica Fries FACU Boreal Sagebrush
Artemisia papposa Blake & Cronq. FACU Fuzzy Sagebrush
Artemisia suksdorfii Piper FACU Coastal Wormwood
Artemisia tilesii Ledeb. FACU Tilesius' Wormwood
Arthrocnemum subterminale (Parish) Standl. FACW Parish's Glasswort
Aruncus dioicus (Walt.) Fern. FACU Bride's‐Feathers
Arundo donax L. FACW Giant‐Reed
Asarum caudatum Lindl. FAC Long‐Tail Wild Ginger
Asarum lemmonii S. Wats. OBL Lemmon's Wild Ginger
Asclepias curassavica L. FAC Bloodflower
Asclepias fascicularis Dcne. FAC Narrow‐Leaf Milkweed
Asclepias incarnata L. OBL Swamp Milkweed
Asclepias oenotheroides Cham. & Schlecht. FACU Zizotes Milkweed
Asclepias speciosa Torr. FAC Showy Milkweed
Asclepias subverticillata (Gray) Vail FACU Horsetail Milkweed
Asclepias syriaca L. FACU Common Milkweed
Asclepias texana Heller FACU Texas Milkweed
Asclepias verticillata L. FACU Whorled Milkweed
Asparagus officinalis L. FACU Asparagus
Asplenium adiantum‐nigrum L. FACU Black Spleenwort
Asplenium platyneuron (L.) B.S.P. FACU Ebony Spleenwort
Asplenium trichomanes L. FAC Maidenhair Spleenwort
Astragalus agrestis Dougl. ex G. Don FAC Cock's‐Head
Astragalus alpinus L. FAC Alpine Milk‐Vetch
Astragalus americanus (Hook.) M.E. Jones FAC American Milk‐Vetch
Astragalus argophyllus Nutt. FACW Silver‐Leaf Milk‐Vetch
Astragalus bodinii Sheldon FACW Bodin's Milk‐Vetch
Astragalus canadensis L. FAC Canadian Milk‐Vetch
Astragalus clevelandii Greene FAC Cleveland's Milk‐Vetch
Astragalus diaphanus Dougl. ex Hook. FACU Transparent Milk‐Vetch
Astragalus eucosmus B.L. Robins. FACU Elegant Milk‐Vetch
Astragalus hornii Gray FAC Horn's Milk‐Vetch
Astragalus lemmonii Gray FACW Lemmon's Milk‐Vetch
Astragalus leptaleus Gray OBL Park Milk‐Vetch
Astragalus limnocharis Barneby OBL Cedar‐Breaks Milk‐Vetch
Astragalus phoenix Barneby FACU Ash Meadows Milk‐Vetch
Astragalus pycnostachyus Gray OBL Marsh Milk‐Vetch
Astragalus robbinsii (Oakes) Gray FAC Robbins' Milk‐Vetch
Astragalus tener Gray FACW Alkali Milk‐Vetch
Athyrium americanum (Butters) Maxon FAC American Alpine Lady Fern
Athyrium filix‐femina (L.) Roth FAC Subarctic Lady Fern
Atriplex amnicola P.G. Wilson FAC Swamp Saltbush
Atriplex argentea Nutt. FAC Silverscale
Atriplex bonnevillensis C.A. Hanson FACW Bonneville Saltbush
Atriplex californica Moq. FAC California Saltbush
Atriplex cordulata Jepson FAC Heartscale
Atriplex coronata S. Wats. FACW Crown Saltbush
Atriplex coulteri (Moq.) D. Dietr. FACU Coulter's Saltbush
Atriplex depressa Jepson FAC Rhomboid‐Bract Saltbush
Atriplex dioica Raf. FAC Saline Saltbush
Atriplex fruticulosa Jepson FACW Ball Saltbush
Atriplex gmelinii C.A. Mey. ex Bong. FACW Gmelin's Saltbush
Atriplex griffithsii Standl. FACU Griffiths' Saltbush
Atriplex hillmanii (M.E. Jones) Standley FACU Hillman's Silverscale
Atriplex hortensis L. FAC Garden Orache
Atriplex joaquiniana A. Nels. FACU San Joaquin Saltbush
Atriplex lentiformis (Torr.) S. Wats. FAC Quailbush
Atriplex leucophylla (Moq.) D. Dietr. FAC Beach Saltbush
Atriplex minuscula Standl. FACU Lesser Saltbush
Atriplex pacifica A. Nels. FACU Davidson's Saltbush
Atriplex parishii S. Wats. FAC Brittlescale
Atriplex parryi S. Wats. FAC Parry's Saltbush
Atriplex patula L. FACW Halberd‐Leaf Orache
Atriplex persistens Stutz & Chu FACW Sacramento Saltbush
Atriplex phyllostegia (Torr. ex S. Wats.) S. Wats. FACW Arrow Saltbush
Atriplex polycarpa (Torr.) S. Wats. FACU Cattle‐Spinach
Atriplex prostrata Bouchér ex DC. FACW Hastate Orache
Atriplex pusilla (Torr.) S. Wats. FAC Smooth Saltbush
Atriplex rosea L. FACU Tumbling Orache
Atriplex semibaccata R. Br. FAC Australian Saltbush
Atriplex serenana A. Nels. FAC Bracted Saltbush
Atriplex spinifera J.F. Macbr. FAC Spinescale
Atriplex suberecta I. Verd. FACU Peregrine Saltbush
Atriplex torreyi (S. Wats.) S. Wats. FAC Torrey's Saltbush
Atriplex tridentata Kuntze FACW Basin Saltbush
Atriplex truncata (Torr. ex S. Wats.) Gray FACU Wedge‐Leaf Orache
Atriplex tularensis Coville FAC Bakersfield Saltbush
Atriplex vallicola Hoover FACW Lost Hills Saltbush
Atriplex watsonii A. Nels. FACW Watson's Saltbush
Atriplex welshii C.A. Hanson FACU Welsh's Saltbush
Avicennia marina (Forssk.) Vierh. OBL Gray Mangrove
Axonopus compressus (Sw.) Beauv. FACW Broad‐Leaf Carpet Grass
Axonopus fissifolius (Raddi) Kuhlm. FAC Narrow‐Leaf Carpet Grass
Azolla filiculoides Lam. OBL Large Mosquito Fern
Azolla microphylla Kaulfuss OBL Mexican Mosquito Fern
Baccharis glutinosa Pers. FACW
Baccharis neglecta Britt. FAC Roosevelt‐Weed
Baccharis salicifolia (Ruiz & Pavón) Pers. FAC Mule's‐Fat
Baccharis salicina Torr. & Gray FACW Great Plains False Willow
Baccharis sarothroides Gray FACU Rosinbush
Baccharis sergiloides Gray FACU Squaw's False Willow
Baccharis wrightii Gray FACU Wright's False Willow
Bacopa eisenii (Kellogg) Pennell OBL Gila River Water‐Hyssop
Bacopa monnieri (L.) Pennell OBL Herb‐of‐Grace
Bacopa repens (Sw.) Wettst. OBL Creeping Water‐Hyssop
Bacopa rotundifolia (Michx.) Wettst. OBL Disk Water‐Hyssop
Bambusa vulgaris Schrad. ex J.C. Wendl. FACU Feathery Bamboo
Barbarea orthoceras Ledeb. FACW American Yellow‐Rocket
Barbarea vulgaris Ait. f. FAC Garden Yellow‐Rocket
Barkleyanthus salicifolius (Kunth) H.E. Robins. & Brett. FAC Barkley's‐Ragwort
Bassia americana (S. Wats.) A.J. Scott FAC Greenmolly
Bassia californica (S. Wats.) A.J. Scott FACW California Smotherweed
Bassia hirsuta (L.) Aschers. OBL Hairy Smotherweed
Bassia hyssopifolia (Pallas) Kuntz FAC Five‐Horn Smotherweed
Bassia scoparia (L.) A.J. Scott FAC Mexican‐Fireweed
Batis maritima L. OBL Turtleweed
Beckmannia syzigachne (Steud.) Fern. OBL American Slough Grass
Berberis thunbergii DC. FACU Japanese Barberry
Berberis vulgaris L. FACU European Barberry
Bergia texana (Hook.) Seub. ex Walp. OBL Texas Bergia
Berula erecta (Huds.) Coville OBL Cut‐Leaf‐Water‐Parsnip
Besseya alpina (Gray) Rydb. FACW Alpine Coraldrops
Besseya plantaginea (James) Rydb. FAC White River Coraldrops
Betula glandulosa Michx. OBL Resin Birch
Betula occidentalis Hook. FACW Water Birch
Betula papyrifera Marsh. FAC Paper Birch
Betula pubescens Ehrh. FAC Downy Birch
Betula pumila L. OBL Bog Birch
Bidens aurea (Ait.) Sherff OBL Arizona Beggarticks
Bidens beckii Torr. ex Spreng. OBL Beck's Water‐Marigold
Bidens bigelovii Gray FACW Bigelow's Beggarticks
Bidens bipinnata L. FAC Spanish‐Needles
Bidens cernua L. OBL Nodding Burr‐Marigold
Bidens frondosa L. FACW Devil's‐Pitchfork
Bidens laevis (L.) B.S.P. OBL Smooth Beggarticks
Bidens leptocephala Sherff FAC Few‐Flower Beggarticks
Bidens pilosa L. FAC Hairy Beggarticks
Bidens tenuisecta Gray FAC Slim‐Lobe Beggarticks
Bidens tripartita L. OBL Three‐Lobe Beggarticks
Bidens vulgata Greene FACW Tall Beggarticks
Bistorta bistortoides (Pursh) Small FACW American Bistort
Bistorta vivipara (L.) Delarbre FAC Serpent‐Grass
Blechnum spicant (L.) Sm. FAC Deer Fern
Blennosperma bakeri Heiser OBL Baker's Stickyseed
Blennosperma nanum (Hook.) Blake FACW Common Stickyseed
Bloomeria clevelandii S. Wats. FACU San Diego Goldenstars
Boechera grahamii (Lehm.) Windham & Al‐Shehbaz FACU
Boechera holboellii (Hornem.) A.& D. Löve FACU Holboell's Rockcress
Boechera lemmonii (S. Wats.) W.A. Weber FACU Soldier Rockcress
Boechera stricta (Graham) Al‐Shehbaz FACU Canadian Rockcress
Boehmeria cylindrica (L.) Sw. OBL Small‐Spike False Nettle
Boerhavia erecta L. FACU Erect Spiderling
Bolandra californica Gray FACW Sierran False Coolwort
Bolandra oregana S. Wats. FACW Northern False Coolwort
Boltonia asteroides (L.) L'Hér. OBL White Doll's Daisy
Bombycilaena californica (Fisch. & C.A. Mey.) Holub FACU False Cottonseed
Borrichia frutescens (L.) DC. FACW Bushy Seaside‐Tansy
Bothriochloa bladhii (Retz.) S.T. Blake FACU Australian Beard Grass
Botrychium ascendens W.H. Wagner FAC Triangle‐Lobe Moonwort
Botrychium crenulatum W.H. Wagner FACW Scalloped Moonwort
Botrychium hesperium (Maxon & Clausen) W.H. Wagner & Lelling FACU Western Moonwort
Botrychium lanceolatum (Gmel.) Angstr. FACW Lance‐Leaf Moonwort
Botrychium lunaria (L.) Sw. FAC Common Moonwort
Botrychium pinnatum St. John FACU Northeastern Moonwort
Botrychium simplex E. Hitchc. FAC Least Moonwort
Botrypus virginianus (L.) Holub FAC Rattlesnake Fern
Bouteloua dactyloides (Nutt.) J.T. Columbus FACU Buffalo Grass
Bowlesia incana Ruiz & Pavón FACU Hoary Bowlesia
Boykinia major Gray FACW Mountain Brookfoam
Boykinia occidentalis Torr. & Gray FAC Coastal Brookfoam
Boykinia rotundifolia Parry FACW Round‐Leaf Brookfoam
Brasenia schreberi J.F. Gmel. OBL Watershield
Brassica juncea (L.) Czern. FACU Chinese Mustard
Brassica rapa L. FACU Rape
Braya glabella Richards. FAC Smooth Northern‐Rockcress
Brickellia californica (Torr. & Gray) Gray FACU California Brickellbush
Brickellia greenei Gray FACU Mountain Brickellbush
Briza media L. FAC Perennial Quaking Grass
Briza minor L. FAC Lesser Quaking Grass
Brodiaea coronaria (Salisb.) Engl. FAC Harvest Cluster‐Lily
Brodiaea elegans Hoover FACU Elegant Cluster‐Lily
Brodiaea filifolia S. Wats. FAC Thread‐Leaf Cluster‐Lily
Brodiaea orcuttii (Greene) Baker OBL Orcutt's Cluster‐Lily
Brodiaea pallida Hoover FACW Chinese Camp Cluster‐Lily
Bromidium tandilense (Kuntze) Rúgolo OBL Kennedy's Tropical Bent
Bromus arvensis L. FACU Field Brome
Bromus ciliatus L. FAC Fringed Brome
Bromus hordeaceus L. FACU Soft Brome
Bromus inermis Leyss. FACU Smooth Brome
Bromus pubescens Muhl. ex Willd. FACU Hairy Woodland Brome
Bromus richardsonii Link FACU Richardson's Brome
Bromus vulgaris (Hook.) Shear FACU Colombian Brome
Broussonetia papyrifera (L.) L'Hér. ex Vent. FACU Paper‐Mulberry
Browallia eludens R.K. Van Devender & P.D. Jenkins FACW Bush‐Violet
Buchnera americana L. FAC American Bluehearts
Buddleja davidii Franch. FACU Orange‐Eye Butterfly‐Bush
Bulbostylis barbata (Rottb.) C.B. Clarke FACU Water‐Grass
Bulbostylis capillaris (L.) Kunth ex C.B. Clarke FACU Dense‐Tuft Hair Sedge
Bulbostylis funckii (Steud.) C.B. Clarke FACW Funck's Hair Sedge
Bulbostylis juncoides (Vahl) Kükenth. ex Herter FACW Rush Hair Sedge
Butomus umbellatus L. OBL Flowering‐Rush
Cabomba caroliniana Gray OBL Carolina Fanwort
Cakile edentula (Bigelow) Hook. FACU American Searocket
Cakile maritima Scop. FAC European Searocket
Calamagrostis bolanderi Thurb. FACW Bolander's Reed Grass
Calamagrostis breweri Thurb. FACW Short‐Hair Reed Grass
Calamagrostis canadensis (Michx.) Beauv. FACW Bluejoint
Calamagrostis nutkaensis (J. Presl) J. Presl ex Steud. FACW Nootka Reed Grass
Calamagrostis scopulorum M.E. Jones FAC Ditch Reed Grass
Calamagrostis stricta (Timm) Koel. FACW Slim‐Stem Reed Grass
Calamagrostis tweedyi (Scribn.) Scribn. ex Vasey FAC Cascade Reed Grass
Calandrinia ciliata (Ruiz & Pavón) DC. FACU Fringed Redmaids
Calibrachoa parviflora (Juss.) D'Arcy FACW Seaside‐Petunia
Callisia repens (Jacq.) L. FACU Creeping‐Inchplant
Callitriche hermaphroditica L. OBL Autumn Water‐Starwort
Callitriche heterophylla Pursh OBL Greater Water‐Starwort
Callitriche marginata Torr. OBL Winged Water‐Starwort
Callitriche palustris L. OBL Vernal Water‐Starwort
Callitriche stagnalis Scop. OBL Pond Water‐Starwort
Callitriche trochlearis Fassett OBL Effluent Water‐Starwort
Calochortus excavatus Greene FACU Inyo Mariposa‐Lily
Calochortus longebarbatus S. Wats. FAC Long‐Beard Mariposa‐Lily
Calochortus minimus Ownbey FAC Sierran Mariposa‐Lily
Calochortus monanthus Ownbey FAC Shasta River Mariposa‐Lily
Calochortus nudus S. Wats. FAC Naked Mariposa‐Lily
Calochortus palmeri S. Wats. FACW Palmer's Mariposa‐Lily
Calochortus striatus Parish FACW Alkali Mariposa‐Lily
Calochortus uniflorus Hook. & Arn. FACW Monterey Mariposa‐Lily
Caltha leptosepala DC. OBL White Marsh‐Marigold
Caltha palustris L. OBL Yellow Marsh‐Marigold
Calycanthus occidentalis Hook. & Arn. FAC Western Sweetshrub
Calypso bulbosa (L.) Oakes FAC Fairy‐Slipper Orchid
Calyptocarpus vialis Less. FAC Straggler Daisy
Calystegia sepium (L.) R. Br. FAC Hedge False Bindweed
Camassia leichtlinii (Baker) S. Wats. FACW Large Camas
Camassia quamash (Pursh) Greene FACW Small Camas
Camelina microcarpa Andrz. ex DC. FACU Little‐Pod False Flax
Camelina sativa (L.) Crantz FACU Gold‐of‐Pleasure
Camissonia breviflora (Torr. & Gray) Raven FAC Short‐Flower Suncup
Camissonia subacaulis (Pursh) Raven FACW Long‐Leaf Suncup
Camissonia tanacetifolia (Torr. & Gray) Raven FACU Tansy‐Leaf Suncup
Campanula californica (Kellogg) Heller OBL Swamp Bellflower
Campanula parryi Gray FACU Parry's Bellflower
Campanula rotundifolia L. FACU Bluebell‐of‐Scotland
Campanula scouleri Hook. ex A. DC. FACU Pale Bellflower
Campanula uniflora L. FAC Arctic Bellflower
Campanula wilkinsiana Greene FACW Wilkins' Bellflower
Campsis radicans (L.) Seem. ex Bureau FACU Trumpet‐Creeper
Canadanthus modestus (Lindl.) Nesom FACW Canada‐Aster
Cannabis sativa L. FACU Hemp
Capsella bursa‐pastoris (L.) Medik. FACU Shepherd's‐Purse
Cardamine angulata Hook. FACW Seaside Bittercress
Cardamine bellidifolia L. FAC Alpine Bittercress
Cardamine breweri S. Wats. FACW Sierran Bittercress
Cardamine constancei Detling FAC Constance's Bittercress
Cardamine cordifolia Gray FACW Large Mountain Bittercress
Cardamine flexuosa With. FACU Woodland Bittercress
Cardamine hirsuta L. FACU Hairy Bittercress
Cardamine macrocarpa Brandeg. FAC Large‐Seed Bittercress
Cardamine nuttallii Greene FAC Nuttall's Toothwort
Cardamine occidentalis (S. Wats. ex B.L. Robins.) T.J. Howell FACW Big Western Bittercress
Cardamine oligosperma Nutt. FAC Little Western Bittercress
Cardamine pachystigma (S. Wats.) Rollins FAC Serpentine Bittercress
Cardamine parviflora L. FACW Sand Bittercress
Cardamine pensylvanica Muhl. ex Willd. FACW Quaker Bittercress
Cardamine rupicola (O.E. Schulz) C.L. Hitchc. FAC Cliff Bittercress
Cardamine umbellata Greene FACW Umbell's Bittercress
Carduus nutans L. FACU Nodding Plumeless‐Thistle
Carex aboriginum M.E. Jones, 1910 OBL
Carex abrupta Mackenzie FAC Abrupt‐Beak Sedge
Carex albida Bailey OBL White Sedge
Carex albonigra Mackenzie FACU Black‐and‐White‐Scale Sedge
Carex alma Bailey OBL Sturdy Sedge
Carex amplifolia Boott OBL Big‐Leaf Sedge
Carex angustata Boott FACW Many‐Fruit Sedge
Carex aperta Boott FACW Columbian Sedge
Carex aquatilis Wahlenb. OBL Leafy Tussock Sedge
Carex arcta Boott OBL Northern Cluster Sedge
Carex atherodes Spreng. OBL Wheat Sedge
Carex athrostachya Olney FACW Slender‐Beak Sedge
Carex atrosquama Mackenzie FACU Lesser Black‐Scale Sedge
Carex aurea Nutt. OBL Golden‐Fruit Sedge
Carex barbarae Dewey FAC Santa Barbara Sedge
Carex bebbii Olney ex Fern. OBL Bebb's Sedge
Carex bella Bailey FACU Southwestern Showy Sedge
Carex blanda Dewey FAC Eastern Woodland Sedge
Carex bolanderi Olney FAC Bolander's Sedge
Carex brevior (Dewey) Mackenzie FAC Short‐Beak Sedge
Carex brunnescens (Pers.) Poir. OBL Brownish Sedge
Carex buxbaumii Wahlenb. OBL Brown Bog Sedge
Carex californica Bailey FACW California Sedge
Carex canescens L. OBL Hoary Sedge
Carex capillaris L. FACW Hair‐Like Sedge
Carex capitata L. FAC Capitate Sedge
Carex chordorrhiza Ehrh. ex L. f. OBL Rope‐Root Sedge
Carex comosa Boott OBL Bearded Sedge
Carex concinna R. Br. FAC Low Northern Sedge
Carex conoidea Schkuhr ex Willd. FACW Open‐Field Sedge
Carex constanceana Stacey FACW Constance's Sedge
Carex crawei Dewey FACW Crawe's Sedge
Carex crawfordii Fern. FAC Crawford's Sedge
Carex cusickii Mackenzie ex Piper & Beattie OBL Cusick's Sedge
Carex densa (Bailey) Bailey OBL Dense Sedge
Carex deweyana Schwein. FACU Dewey's Sedge
Carex diandra Schrank OBL Lesser Tussock Sedge
Carex disperma Dewey OBL Soft‐Leaf Sedge
Carex douglasii Boott FAC Douglas' Sedge
Carex echinata Murr. OBL Star Sedge
Carex elynoides Holm FAC Black‐Root Sedge
Carex emoryi Dewey OBL Emory's Sedge
Carex exsiccata Bailey OBL Western Inflated Sedge
Carex feta Bailey FACW Green‐Sheath Sedge
Carex fissuricola Mackenzie FACW Cleft Sedge
Carex flava L. OBL Yellow‐Green Sedge
Carex foenea Willd. FACU
Carex fracta Mackenzie FAC Fragile‐Sheath Sedge
Carex frankii Kunth OBL Frank's Sedge
Carex fuliginosa Schkuhr FACU Short‐Leaf Sedge
Carex garberi Fern. FACW Elk Sedge
Carex gravida Bailey FACW Heavy Sedge
Carex gynocrates Wormsk. ex Drej. OBL Northern Bog Sedge
Carex gynodynama Olney FAC Olney's Hairy Sedge
Carex hallii Olney FACW Deer Sedge
Carex harfordii Mackenzie OBL Harford's Sedge
Carex hassei Bailey FACW Hasse's Sedge
Carex haydeniana Olney FAC Hayden's Sedge
Carex hendersonii Bailey FAC Henderson's Sedge
Carex heteroneura W. Boott FAC Different‐Nerve Sedge
Carex hirtissima W. Boott OBL Fuzzy Sedge
Carex hoodii Boott FAC Hood's Sedge
Carex hystericina Muhl. ex Willd. OBL Porcupine Sedge
Carex idahoa Bailey FACW Idaho Sedge
Carex illota Bailey FACW Small‐Head Sedge
Carex incurviformis Mackenzie FAC Coastal‐Sand Sedge
Carex infirminervia Naczi FAC
Carex integra Mackenzie OBL Smooth‐Beak Sedge
Carex interior Bailey OBL Inland Sedge
Carex interrupta Boeckl. OBL Green‐Fruit Sedge
Carex jonesii Bailey FACW Jones' Sedge
Carex klamathensis B.L. Wilson & L.P. Janeway OBL Klamath Sedge
Carex lachenalii Schkuhr OBL Arctic Hare‐Foot Sedge
Carex laeviculmis Meinsh. FACW Smooth‐Stem Sedge
Carex lasiocarpa Ehrh. OBL Woolly‐Fruit Sedge
Carex lemmonii W. Boott OBL Lemmon's Sedge
Carex lenticularis Michx. OBL Lakeshore Sedge
Carex leporinella Mackenzie FACW Sierran Hare Sedge
Carex leptalea Wahlenb. OBL Bristly‐Stalk Sedge
Carex leptopoda Mackenzie FAC Taper‐Fruit Short‐Scale Sedge
Carex limosa L. OBL Mud Sedge
Carex livida (Wahlenb.) Willd. OBL Livid Sedge
Carex longii Mackenzie FACW Long's Sedge
Carex luzulifolia W. Boott FACW Little‐Leaf Sedge
Carex luzulina Olney OBL Woodrush Sedge
Carex lyngbyei Hornem. OBL Lyngbye's Sedge
Carex macloviana d'Urv. FACW Falkland Island Sedge
Carex macrochaeta C.A. Mey. FACW Alaska Long‐Awn Sedge
Carex magellanica Lam. OBL Boreal‐Bog Sedge
Carex mariposana Bailey ex Mackenzie FACW Mariposa Sedge
Carex mckittrickensis P.W. Ball FACW Guadalupe Mountain Sedge
Carex meadii Dewey OBL Mead's Sedge
Carex media R. Br. FACW Montana Sedge
Carex mendocinensis Olney FACW Mendocino Sedge
Carex mertensii Prescott ex Bong. FAC Mertens' Sedge
Carex microdonta Torr. & Hook. FAC Little‐Tooth Sedge
Carex microglochin Wahlenb. OBL False Uncinia Sedge
Carex micropoda C.A. Mey. FAC Pyrenean Sedge
Carex microptera Mackenzie FAC Small‐Wing Sedge
Carex molesta Mackenzie ex Bright FAC Troublesome Sedge
Carex nardina Fries FACU Nard Sedge
Carex nebrascensis Dewey OBL Nebraska Sedge
Carex nelsonii Mackenzie FAC Nelson's Sedge
Carex nervina Bailey FACW Sierran Sedge
Carex neurophora Mackenzie FACW Alpine Nerve Sedge
Carex nigricans C.A. Mey. FACW Black Alpine Sedge
Carex nova Bailey FAC New Sedge
Carex nudata W. Boott FACW Torrent Sedge
Carex obispoensis Stacey FACW San Luis Obispo Sedge
Carex obnupta Bailey OBL Slough Sedge
Carex ovalis Goodenough FACW Oval Sedge
Carex pachystachya Cham. ex Steud. FAC Thick‐Head Sedge
Carex pallescens L. FAC Pale Sedge
Carex pansa Bailey FACU Sand‐Dune Sedge
Carex parryana Dewey FAC Parry's Sedge
Carex pauciflora Lightf. OBL Few‐Flower Sedge
Carex paysonis Clokey FACU Payson's Sedge
Carex pellita Muhl. ex Willd. OBL Woolly Sedge
Carex pelocarpa F.J. Herm. FAC Dusky‐Seed Sedge
Carex pendula Huds. FAC Pendulous Sedge
Carex petasata Dewey FAC Liddon Sedge
Carex phaeocephala Piper FACU Mountain Hare Sedge
Carex podocarpa R. Br. FAC Short‐Stalk Sedge
Carex praeceptorum Mackenzie OBL Teacher's Sedge
Carex praegracilis W. Boott FACW Clustered Field Sedge
Carex praticola Rydb. FACW Northern Meadow Sedge
Carex preslii Steud. FACU Presl's Sedge
Carex raynoldsii Dewey FACU Raynolds' Sedge
Carex retrorsa Schwein. OBL Retrorse Sedge
Carex rostrata Stokes OBL Swollen Beaked Sedge
Carex rupestris All. FACU Curly Sedge
Carex saliniformis Mackenzie FACW Santa Cruz Sedge
Carex sartwelliana Olney OBL Yosemite Sedge
Carex sartwellii Dewey OBL Sartwell's Sedge
Carex saxatilis L. OBL Russet Sedge
Carex scabriuscula Mackenzie FACW Cascade Sedge
Carex schottii Dewey OBL Schott's Sedge
Carex scirpoidea Michx. FAC Canadian Single‐Spike Sedge
Carex scoparia Schkuhr ex Willd. FACW Pointed Broom Sedge
Carex scopulorum Holm FACW Holm's Rocky Mountain Sedge
Carex senta Boott OBL Western Rough Sedge
Carex serratodens W. Boott FACW Saw‐Tooth Sedge
Carex sheldonii Mackenzie OBL Sheldon's Sedge
Carex simulata Mackenzie OBL Analogue Sedge
Carex spectabilis Dewey FACW Northwestern Showy Sedge
Carex specuicola J.T. Howell OBL Navajo Sedge
Carex spissa Bailey FAC San Diego Sedge
Carex sprengelii Dewey ex Spreng. FAC Long‐Beak Sedge
Carex stevenii (Holm) Kalela FAC Steven's Sedge
Carex stipata Muhl. ex Willd. OBL Stalk‐Grain Sedge
Carex stricta Lam. OBL Uptight Sedge
Carex subbracteata Mackenzie FACW Small‐Bract Sedge
Carex subfusca W. Boott FAC Rusty Sedge
Carex subnigricans Stacey FAC Dark Mountain Sedge
Carex sychnocephala Carey FACW Many‐Head Sedge
Carex tenera Dewey FACW Quill Sedge
Carex tenuiflora Wahlenb. OBL Sparse‐Flower Sedge
Carex thurberi Dewey FAC Thurber's Sedge
Carex tiogana D. Taylor & J. Mastrogiuseppe, sp. nov. ine FACW Mono Sedge
Carex torreyi Tuckerman FAC Torrey's Sedge
Carex tumulicola Mackenzie FACU Foothill Sedge
Carex turbinata Liebm. FACU Turban Sedge
Carex unilateralis Mackenzie FACW One‐Sided Sedge
Carex utriculata Boott OBL Northwest Territory Sedge
Carex vallicola Dewey FAC Valley Sedge
Carex vernacula Bailey FAC Native Sedge
Carex vesicaria L. OBL Lesser Bladder Sedge
Carex viridula Michx. OBL Little Green Sedge
Carex vulpinoidea Michx. OBL Common Fox Sedge
Carex X physocarpoides Lepage OBL
Carpobrotus chilensis (Molina) N.E. Br. FACU Baby Sun‐Rose
Carum carvi L. FACU Caraway
Carya illinoinensis (Wangenh.) K. Koch FAC Pecan
Cassiope mertensiana (Bong.) G. Don FACU Western Moss‐Heather
Cassiope tetragona (L.) D. Don FACU White Arctic Mountain‐Heather
Castilleja ambigua Hook. & Arn. FACW Johnnynip
Castilleja campestris (Benth.) Chuang & Heckard FACW Vernal‐Pool Indian‐Paintbrush
Castilleja chrymactis Pennell OBL Panhandle Indian‐Paintbrush
Castilleja lemmonii Gray FACW Lemmon's Indian‐Paintbrush
Castilleja lineata Greene FACW Marsh‐Meadow Indian‐Paintbrush
Castilleja miniata Dougl. ex Hook. FACW Great Red Indian‐Paintbrush
Castilleja minor (Gray) Gray OBL Alkali Indian‐Paintbrush
Castilleja mogollonica Pennell FACW Mogollon Indian‐Paintbrush
Castilleja occidentalis Torr. FAC Pale‐Yellow Indian‐Paintbrush
Castilleja parviflora Bong. FAC Small‐Flower Indian‐Paintbrush
Castilleja rhexiifolia Rydb. FAC Rosy Indian‐Paintbrush
Castilleja salsuginosa N. Holmgren FAC Monte Neva Indian‐Paintbrush
Castilleja septentrionalis Lindl. FACU Labrador Indian‐Paintbrush
Castilleja suksdorfii Gray FACW Suksdorf's Indian‐Paintbrush
Castilleja tenuis (Heller) Chuang & Heckard FAC Hairy Indian‐Paintbrush
Castilleja uliginosa Eastw. OBL Pitkin Marsh Indian‐Paintbrush
Casuarina equisetifolia L. FACU Beach She‐Oak
Catabrosa aquatica (L.) Beauv. OBL Water Whorl Grass
Catalpa speciosa Warder ex Engelm. FAC Northern Catalpa
Celastrus scandens L. FACU American Bittersweet
Celtis laevigata Willd. FAC Sugar‐Berry
Celtis occidentalis L. FAC Common Hackberry
Celtis reticulata Torr. FAC Net‐Leaf Hackberry
Cenchrus echinatus L. FACU Southern Sandburr
Cenchrus myosuroides Kunth FACU Big Sandburr
Centaurea cyanus L. FACU Garden Cornflower
Centaurium calycosum (Buckl.) Fern. FACW Buckley's Centaury
Centaurium davyi (Jepson) Abrams FAC Davy's Centaury
Centaurium erythraea Rafn FAC European Centaury
Centaurium exaltatum (Griseb.) W. Wight ex Piper FACW Desert Centaury
Centaurium glanduliferum (Correll) B.L. Turner FACU Sticky Centaury
Centaurium muehlenbergii (Griseb.) W. Wight ex Piper FACW Monterey Centaury
Centaurium namophilum Reveal, Broome & Beatley FACW Spring‐Loving Centaury
Centaurium nudicaule (Engelm.) B.L. Robins. FACW Santa Catalina Mountain Centaury
Centaurium pulchellum (Sw.) Druce FACU Branched Centaury
Centaurium tenuiflorum (Hoffmannsegg & Link) Fritsch FACW Slender Centaury
Centaurium trichanthum (Griseb.) B.L. Robins. FAC Alkali Centaury
Centromadia fitchii (Gray) Greene FACU Fitch's False Tarplant
Centromadia parryi (Greene) Greene FACW Parry's False Tarplant
Centromadia pungens (Hook. & Arn.) Greene FAC Pungent False Tarplant
Cephalanthus occidentalis L. OBL Common Buttonbush
Cerastium arvense L. FACU Field Mouse‐Ear Chickweed
Cerastium axillare Correll FACU Trans‐Pecos Mouse‐Ear Chickweed
Cerastium beeringianum Cham. & Schlecht. FACU Bering Sea Mouse‐Ear Chickweed
Cerastium brachypodum (Engelm. ex Gray) B.L. Robins. FAC Short‐Stalk Mouse‐Ear Chickweed
Cerastium fontanum Baumg. FACU Common Mouse‐Ear Chickweed
Cerastium nutans Raf. FACU Nodding Mouse‐Ear Chickweed
Ceratophyllum demersum L. OBL Coon's‐Tail
Ceratopteris thalictroides (L.) Brongn. OBL Watersprite
Chaerophyllum tainturieri Hook. FAC Hairy‐Fruit Chervil
Chamaecrista fasciculata (Michx.) Greene FACU Sleepingplant
Chamaecyparis lawsoniana (A. Murr.) Parl. FACU Port Orford‐Cedar
Chamaesyce hirta (L.) Millsp. FACU Pill‐Pod Sandmat
Chamaesyce hooveri (L.C. Wheeler) Koutnik OBL Hoover's Sandmat
Chamaesyce hypericifolia (L.) Millsp. FACU Graceful Sandmat
Chamaesyce hyssopifolia (L.) Small FACU Hyssop‐Leaf Sandmat
Chamaesyce nutans (Lag.) Small FACU Eyebane
Chamaesyce prostrata (Ait.) Small FACU Prostrate Sandmat
Chamaesyce serpens (Kunth) Small FACU Matted Sandmat
Chamerion angustifolium (L.) Holub FACU Narrow‐Leaf Fireweed
Chamerion latifolium (L.) Holub FACW Broad‐Leaf Fireweed
Chasmanthium latifolium (Michx.) Yates FAC Indian Wood‐Oats
Chelidonium majus L. FACU Greater Celandine
Chenopodium album L. FACU Lamb's‐Quarters
Chenopodium chenopodioides (L.) Aellen FACW Low Goosefoot
Chenopodium foliosum (Moench) Aschers. FACU Leafy Goosefoot
Chenopodium fremontii S. Wats. FACU Fremont's Goosefoot
Chenopodium glaucum L. FAC Oak‐Leaf Goosefoot
Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats. FACU Narrow‐Leaf Goosefoot
Chenopodium macrospermum Hook. f. FACW Large‐Seed Goosefoot
Chenopodium murale L. FACU Nettle‐Leaf Goosefoot
Chenopodium rubrum L. FACW Red Goosefoot
Chilopsis linearis (Cav.) Sweet FACU Desert‐Willow
Chionodoxa luciliae Boiss. FACU Glory‐of‐the‐Snow
Chionophila jamesii Benth. FACU Rocky Mountain Snowlover
Chloracantha spinosa (Benth.) Nesom FAC Mexican‐Devilweed
Chloris gayana Kunth FACU Rhodes Grass
Chloris virgata Sw. FACU Feather Windmill Grass
Chrysosplenium glechomifolium Nutt. OBL Pacific Golden‐Saxifrage
Chrysosplenium tetrandrum (Lund ex Malmgr.) Th. Fries OBL Northern Golden‐Saxifrage
Cicendia quadrangularis (Lam.) Griseb. FAC Oregon Timwort
Cichorium intybus L. FACU Chicory
Cicuta bulbifera L. OBL Bulblet‐Bearing Water‐Hemlock
Cicuta douglasii (DC.) Coult. & Rose OBL Western Water‐Hemlock
Cicuta maculata L. OBL Spotted Water‐Hemlock
Cinna bolanderi Scribn. FACW Bolander's Wood‐Reed
Cinna latifolia (Trev. ex Goepp.) Griseb. FACW Slender Wood‐Reed
Circaea alpina L. FAC Small Enchanter's‐Nightshade
Cirsium andrewsii (Gray) Jepson FAC Franciscan Thistle
Cirsium arizonicum (Gray) Petrak FACU Arizona Thistle
Cirsium arvense (L.) Scop. FACU Canadian Thistle
Cirsium crassicaule (Greene) Jepson OBL Slough Thistle
Cirsium douglasii DC. OBL Douglas' Thistle
Cirsium edule Nutt. FAC Edible Thistle
Cirsium flodmanii (Rydb.) Arthur FAC Flodman's Thistle
Cirsium foliosum (Hook.) DC. FAC Elk Thistle
Cirsium fontinale (Greene) Jepson OBL Fountain Thistle
Cirsium hydrophilum (Greene) Jepson OBL Suisun Thistle
Cirsium mohavense (Greene) Petrak FACU Mojave Thistle
Cirsium parryi (Gray) Petrak FACW Parry's Thistle
Cirsium scariosum Nutt. FAC Meadow Thistle
Cirsium tracyi (Rydb.) Petrak FACU Tracy's Thistle
Cirsium undulatum (Nutt.) Spreng. FACU Wavy‐Leaf Thistle
Cirsium vinaceum (Woot. & Standl.) Woot. & Standl. OBL Sacramento Mountain Thistle
Cirsium vulgare (Savi) Ten. FACU Bull Thistle
Cistanthe ambigua (S. Wats.) Hershkovitz FAC Desert Pussypaws
Cistanthe rosea (S. Wats.) Hershkovitz FACU Rosy Pussypaws
Cladium californicum (S. Wats.) O'Neill OBL California Saw‐Grass
Cladium mariscus (L.) Pohl OBL Swamp Saw‐Grass
Claytonia cordifolia S. Wats. FAC Heart‐Leaf Springbeauty
Claytonia gypsophiloides Fisch. & C.A. Mey. FACU Gypsum Springbeauty
Claytonia lanceolata Pall. ex Pursh FAC Lance‐Leaf Springbeauty
Claytonia megarhiza (Gray) Parry ex S. Wats. FACU Alpine Springbeauty
Claytonia multiscapa Rydb. FAC Many‐Stem Springbeauty
Claytonia nevadensis S. Wats. FAC Sierran Springbeauty
Claytonia palustris Swanson & Kelley FACW Jonesville Springbeauty
Claytonia parviflora Dougl. ex Hook. FACU Streambank Springbeauty
Claytonia perfoliata Donn ex Willd. FAC Miner's‐Lettuce
Claytonia sibirica L. FAC Siberian Springbeauty
Claytonia washingtoniana (Suksdorf) Suksdorf FACU Washington Springbeauty
Clematis ligusticifolia Nutt. FAC Deciduous Traveler's‐Joy
Clematis pitcheri Torr. & Gray FACU Bluebill
Clematis terniflora DC. FACU Sweet Autumn Virgin's‐Bower
Cleome lutea Hook. FACU Yellow Spider‐Flower
Cleome multicaulis DC. FACW Playa Spider‐Flower
Cleome serrulata Pursh FACU Rocky Mountain Beeplant
Cleomella brevipes S. Wats. FACW Short‐Stalk Stinkweed
Cleomella longipes Torr. FACU Chiricahua Mountain Stinkweed
Cleomella parviflora Gray FACW Small‐Flower Stinkweed
Cleomella plocasperma S. Wats. FACW Alkali Stinkweed
Clinopodium arkansanum (Nutt.) House FAC Limestone Wild Basil
Clitoria mariana L. FACU Atlantic Pigeonwings
Cocculus carolinus (L.) DC. FACU Carolina Coralbead
Coeloglossum viride (L.) Hartman FAC Long‐Bract Frog Orchid
Coix lacryma‐jobi L. FACW Job's‐Tears
Coleanthus subtilis (Tratt.) Seidel OBL Moss Grass
Collinsia tinctoria Hartw. ex Benth. FACU Tinctureplant
Collomia linearis Nutt. FACU Narrow‐Leaf Mountain‐Trumpet
Collomia rawsoniana Greene FACU Flaming Mountain‐Trumpet
Comarum palustre L. OBL Purple Marshlocks
Commelina benghalensis L. FACU Jio
Commelina communis L. FAC Asiatic Dayflower
Commelina erecta L. FACU White‐Mouth Dayflower
Conioselinum pacificum (S. Wats.) Coult. & Rose FAC Pacific Hemlock‐Parsley
Conioselinum scopulorum (Gray) Coult. & Rose FACW Rocky Mountain Hemlock‐Parsley
Conium maculatum L. FACW Poison‐Hemlock
Conoclinium dissectum Gray FACU Pinked Mistflower
Convolvulus equitans Benth. FACU Texas Bindweed
Conyza bonariensis (L.) Cronq. FACU Asthmaweed
Conyza canadensis (L.) Cronq. FACU Canadian Horseweed
Cooperia chlorosolen Herbert FACU Evening Rain‐Lily
Coptis laciniata Gray FAC Oregon Goldthread
Coptis trifolia (L.) Salisb. FACW Three‐Leaf Goldthread
Corallorhiza striata Lindl. FACU Hooded Coralroot
Corallorhiza trifida Chatelain FAC Yellow Coralroot
Corallorhiza wisteriana Conrad FAC Spring Coralroot
Cordylanthus eremicus (Coville & Morton) Munz FACW Desert Bird's‐Beak
Cordylanthus maritimus Nutt. ex Benth. OBL Saltmarsh Bird's‐Beak
Cordylanthus mollis Gray OBL Soft Bird's‐Beak
Cordylanthus palmatus (Ferris) J.F. Macbr. OBL Palm‐Bract Bird's‐Beak
Cordylanthus ramosus Nutt. ex Benth. FACU Bushy Bird's‐Beak
Cordylanthus tecopensis Munz & Roos FACW Tecopa Bird's‐Beak
Coreopsis lanceolata L. FACU Lance‐Leaf Tickseed
Coreopsis tinctoria Nutt. FACU Golden Tickseed
Corispermum americanum (Nutt.) Nutt. FACU American Bugseed
Corispermum hyssopifolium L. FACU Hyssop‐Leaf Bugseed
Cornus alba L. FACW Red Osier
Cornus canadensis L. FAC Canadian Bunchberry
Cornus glabrata Benth. FACW Smooth‐Leaf Dogwood
Cornus nuttallii Audubon ex Torr. & Gray FACU Pacific Flowering Dogwood
Cornus sessilis Torr. ex Dur. FAC Black‐Fruit Dogwood
Cortaderia jubata (Lem. ex Carr.) Stapf FACU Uruguayan Pampas Grass
Cortaderia selloana (J.A. & J.H. Schultes) Aschers. & Graebn. FACU Selloa Pampus Grass
Corydalis caseana Gray FACW Sierran Fumewort
Corylus cornuta Marsh. FACU Beaked Hazelnut
Corymbia citriodora (Hook.) K.D. Hill & L.A. Johnson FACU Lemon‐Scented Ghost‐Gum
Cosmos bipinnatus Cav. FACW Garden Cosmos
Cosmos parviflorus (Jacq.) Pers. FACU Southwestern Cosmos
Cotula australis (Sieber ex Spreng.) Hook. f. FAC Australian Water‐Buttons
Cotula coronopifolia L. OBL Common Brassbuttons
Crassula aquatica (L.) Schoenl. OBL Water Pygmyweed
Crassula connata (Ruiz & Pavón) Berger FAC Sand Pygmyweed
Crassula saginoides (Maxim.) Bywater & Wickens OBL Wrinkle‐Seed Pygmyweed
Crassula solieri (C. Gay) Meigen OBL Smooth‐Seed Pygmyweed
Crassula tillaea Lester‐Garland FACU Moss Pygmyweed
Crataegus douglasii Lindl. FAC Black Hawthorn
Crataegus erythropoda Ashe FAC Cerro Hawthorn
Crataegus monogyna Jacq. FAC English Hawthorn
Crataegus rivularis Nutt. FAC River Hawthorn
Crataegus saligna Greene FAC Willow Hawthorn
Crataegus suksdorfii (Sarg.) Kruschke FAC Suksdorf's Hawthorn
Crepis capillaris (L.) Wallr. FACU Smooth Hawk's‐Beard
Crepis runcinata (James) Torr. & Gray FACU Fiddle‐Leaf Hawk's‐Beard
Cressa truxillensis Kunth FACW Spreading Alkali‐Weed
Crocosmia X crocosmiiflora (V. Lemoine) N.E. Br. FACU
Crypsis alopecuroides (Piller & Mitterp.) Schrad. OBL Fox‐Tail Prickle Grass
Crypsis schoenoides (L.) Lam. OBL Swamp Prickle Grass
Crypsis vaginiflora (Forssk.) Opiz OBL African Prickle Grass
Cryptantha crinita Greene FACU Sacramento Cat's‐Eye
Cryptogramma stelleri (Gmel.) Prantl FACU Fragile Rockbrake
Cyclachaena xanthiifolia (Nutt.) Fresen. FAC Carelessweed
Cycloloma atriplicifolium (Spreng.) Coult. FACU Winged‐Pigweed
Cyclospermum leptophyllum (Pers.) Sprague ex Britt. & Wilson FACU Marsh‐Parsley
Cynodon dactylon (L.) Pers. FACU Bermuda Grass
Cynoglossum officinale L. FACU Gypsy‐Flower
Cynosurus cristatus L. FACU Crested Dog's‐Tail Grass
Cyperus acuminatus Torr. & Hook. ex Torr. OBL Taper‐Tip Flat Sedge
Cyperus aggregatus (Willd.) Endl. FAC Inflated‐Scale Flat Sedge
Cyperus amabilis Vahl FACU Foothill Flat Sedge
Cyperus bipartitus Torr. OBL Shining Flat Sedge
Cyperus croceus Vahl FAC Baldwin's Flat Sedge
Cyperus difformis L. OBL Variable Flat Sedge
Cyperus elegans L. FACW Royal Flat Sedge
Cyperus eragrostis Lam. FACW Tall Flat Sedge
Cyperus erythrorhizos Muhl. OBL Red‐Root Flat Sedge
Cyperus esculentus L. FACW Chufa
Cyperus fendlerianus Boeckl. FAC Fendler's Flat Sedge
Cyperus flavescens L. OBL Yellow Flat Sedge
Cyperus flavicomus Michx. FAC White‐Edge Flat Sedge
Cyperus fuscus L. FAC Galingale
Cyperus gracilis R. Br. FAC Slimjim Flat Sedge
Cyperus hermaphroditus (Jacq.) Standl. FAC Hermaphrodite Flat Sedge
Cyperus involucratus Rottb. FACW Alternate‐Leaf Flat Sedge
Cyperus iria L. FACW Ricefield Flat Sedge
Cyperus laevigatus L. FACW Smooth Flat Sedge
Cyperus lupulinus (Spreng.) Marcks FACU Great Plains Flat Sedge
Cyperus mutisii (Kunth) Griseb. FACU Mutis' Flat Sedge
Cyperus niger Ruiz & Pavón FACW Black Flat Sedge
Cyperus odoratus L. FACW Rusty Flat Sedge
Cyperus onerosus M.C. Johnston FACW Plains Flat Sedge
Cyperus owanii Boeckl. FAC Owan's Flat Sedge
Cyperus papyrus L. OBL Papyrus Flat Sedge
Cyperus parishii Britt. FACW Parish's Flat Sedge
Cyperus retrorsus Chapman FAC Pine‐Barren Flat Sedge
Cyperus rotundus L. FAC Purple Flat Sedge
Cyperus schweinitzii Torr. FAC Sand Flat Sedge
Cyperus seslerioides Kunth FAC Texas Flat Sedge
Cyperus squarrosus L. OBL Awned Flat Sedge
Cyperus strigosus L. FACW Straw‐Color Flat Sedge
Cyperus tetragonus Ell. FACU Four‐Angle Flat Sedge
Cyperus virens Michx. FACW Green Flat Sedge
Cypripedium californicum Gray OBL California Lady's‐Slipper
Cypripedium fasciculatum Kellogg ex S. Wats. FACU Clustered Lady's‐Slipper
Cypripedium montanum Dougl. ex Lindl. FACU Mountain Lady's‐Slipper
Cypripedium parviflorum Salisb. FACW Yellow Lady's‐Slipper
Cypselea humifusa Turp. FACW Panal
Cystopteris bulbifera (L.) Bernh. FAC Bulblet Bladder Fern
Cystopteris fragilis (L.) Bernh. FACU Brittle Bladder Fern
Cystopteris montana (Lam.) Bernh. ex Desv. FAC Mountain Bladder Fern
Dactylis glomerata L. FACU Orchard Grass
Damasonium californicum Torr. OBL Fringed‐Water‐Plantain
Danthonia californica Boland. FACU California Wild Oat Grass
Danthonia decumbens (L.) DC. FAC Common Heath Grass
Danthonia intermedia Vasey FACU Timber Wild Oat Grass
Darlingtonia californica Torr. OBL Cobraplant
Darmera peltata (Torr. ex Benth.) Voss OBL Indian‐Rhubarb
Dasiphora fruticosa (L.) Rydb. FAC Golden‐Hardhack
Datisca glomerata (K. Presl) Baill. FACW Durango‐Root
Deinandra fasciculata (DC.) Greene FACU Clustered Moonshine‐Daisy
Deinandra paniculata (Gray) A. Davids. & Moxley FACU San Diego Moonshine‐Daisy
Deiregyne confusa Garay FAC Rimrock Ladies'‐Braids
Delosperma litorale (Kensit) L. Bolus FACU Delosperma
Delphinium andesicola Ewan FACU Chiricahua Mountain Larkspur
Delphinium barbeyi (Huth) Huth FAC Subalpine Larkspur
Delphinium californicum Torr. & Gray FACU California Coast Larkspur
Delphinium geraniifolium Rydb. FAC Clark Valley Larkspur
Delphinium glaucescens Rydb. FACU Electric Peak Larkspur
Delphinium glaucum S. Wats. FACW Tower Larkspur
Delphinium hesperium Gray FAC Foothill Larkspur
Delphinium multiplex (Ewan) C.L. Hitchc. FAC Kittitas Larkspur
Delphinium nuttallianum Pritz. ex Walp. FAC Two‐Lobe Larkspur
Delphinium nuttallii Gray FACU Upland Larkspur
Delphinium polycladon Eastw. FACW Mountain‐Marsh Larkspur
Delphinium recurvatum Greene FACU Byron Larkspur
Delphinium sapellonis Cockerell FAC Sapello Canyon Larkspur
Delphinium scopulorum Gray FAC Rocky Mountain Larkspur
Delphinium uliginosum Curran OBL Swamp Larkspur
Delphinium X burkei Greene (pro sp.) FACU
Delphinium X occidentale (S. Wats.) S. Wats. (pro sp.) FACU
Deschampsia brevifolia R. Br. FACW Short‐Leaf Hair Grass
Deschampsia caespitosa (L.) Beauv. FACW Tufted Hair Grass
Deschampsia danthonioides (Trin.) Munro FACW Annual Hair Grass
Deschampsia elongata (Hook.) Munro FACW Slender Hair Grass
Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn FACU Mountain Tansy‐Mustard
Desmanthus illinoensis (Michx.) MacM. ex B.L. Robins. & Fern. FACU Prairie Bundle‐Flower
Desmanthus virgatus (L.) Willd. FACU Wild Tantan
Dianthus deltoides L. FAC Maiden Pink
Dicentra formosa (Andrews) Walp. FACU Pacific Bleedinghearts
Dichanthelium acuminatum (Sw.) Gould & C.A. Clark FAC Tapered Rosette Grass
Dichanthelium oligosanthes (J.A. Schultes) Gould FACU Heller's Rosette Grass
Dichanthelium sphaerocarpon (Ell.) Gould FACU Round‐Seed Rosette Grass
Dichelostemma capitatum (Benth.) Wood FACU Bluedicks
Dichondra micrantha Urban FACW Asian Pony's‐Foot
Dichondra sericea Sw. FACU Silver‐Leaf Pony's‐Foot
Didiplis diandra (Nutt. ex DC.) Wood OBL Water‐Purslane
Dieteria bigelovii (Gray) D. Morgan & R.L. Hartman FACW Bigelow's False Tansy‐Aster
Digitalis purpurea L. FACU Purple Foxglove
Digitaria ciliaris (Retz.) Koel. FACU Southern Crab Grass
Digitaria eriantha Steud. FACU Pangola Grass
Digitaria ischaemum (Schreb. ex Schweig.) Schreb. ex Muhl. FACU Smooth Crab Grass
Digitaria sanguinalis (L.) Scop. FACU Hairy Crab Grass
Diodia teres Walt. FACU Poorjoe
Diospyros virginiana L. FAC Common Persimmon
Diphasiastrum complanatum (L.) Holub FAC
Diplacus parviflorus Greene FACU Island Bush‐Monkey‐Flower
Dipsacus fullonum L. FAC Fuller's Teasel
Dirca occidentalis Gray FAC Western Leatherwood
Distichlis spicata (L.) Greene FAC Coastal Salt Grass
Dodecatheon conjugens Greene FACU Bonneville Shootingstar
Dodecatheon dentatum Hook. FACW White Shootingstar
Dodecatheon ellisiae Standl. FACW
Dodecatheon jeffreyi Van Houtte FACW Tall Mountain Shootingstar
Dodecatheon poeticum Henderson FAC Poet's Shootingstar
Dodecatheon pulchellum (Raf.) Merr. FACW Dark‐Throat Shootingstar
Dodecatheon redolens (Hall) H.J. Thompson OBL Scented Shootingstar
Dodecatheon subalpinum Eastw. FACU Sierran Shootingstar
Dodonaea viscosa Jacq. FACU Florida Hopbush
Dopatrium junceum (Roxb.) Buch.‐Ham. ex Benth. OBL Horsefly's‐Eye
Downingia bacigalupii Weiler OBL Bach's Calico‐Flower
Downingia bella Hoover OBL Hoover's Calico‐Flower
Downingia bicornuta Gray OBL Double‐Horn Calico‐Flower
Downingia concolor Greene OBL Maroon‐Spot Calico‐Flower
Downingia cuspidata (Greene) Greene ex Jepson OBL Toothed Calico‐Flower
Downingia elegans (Dougl. ex Lindl.) Torr. OBL Elegant Calico‐Flower
Downingia insignis Greene OBL Harlequin Calico‐Flower
Downingia laeta (Greene) Greene OBL Great Basin Calico‐Flower
Downingia montana Greene OBL Sierran Calico‐Flower
Downingia ornatissima Greene OBL Folded Calico‐Flower
Downingia pulchella (Lindl.) Torr. OBL Flat‐Face Calico‐Flower
Downingia pusilla (G. Don) Torr. OBL Dwarf Calico‐Flower
Downingia yina Applegate OBL Cascade Calico‐Flower
Draba albertina Greene FAC Slender Whitlow‐Grass
Draba aurea Vahl ex Hornem. FACU Golden Whitlow‐Grass
Draba helleriana Greene FAC Heller's Whitlow‐Grass
Draba lonchocarpa Rydb. FACU Lance‐Pod Whitlow‐Grass
Draba paucifructa Clokey & C.L. Hitchc. FAC Charleston Mountain Whitlow‐Grass
Draba praealta Greene FACU Tall Whitlow‐Grass
Draba spectabilis Greene FACU Showy Whitlow‐Grass
Draba stenoloba Ledeb. FACU Alaska Whitlow‐Grass
Dracocephalum parviflorum Nutt. FACU American Dragonhead
Dracopis amplexicaulis (Vahl) Cass. FACW Clasping‐Coneflower
Drosera aliciae Raym.‐Hamet OBL Australian Sundew
Drosera anglica Huds. OBL English Sundew
Drosera capensis L. OBL Cape Sundew
Drosera rotundifolia L. OBL Round‐Leaf Sundew
Drosera tracyi Macfarlane OBL Tracy's Sundew
Drosera X hybrida Macfarlane (pro sp.) OBL
Drosera X obovata Mert. & Koch (pro sp.) OBL
Dryas drummondii Richards. ex Hook. FACU Yellow Mountain‐Avens
Drymaria pachyphylla Woot. & Standl. FACU Thick‐Leaf Drymary
Drymocallis arguta (Pursh) Rydb. FACU
Dryopteris carthusiana (Vill.) H.P. Fuchs FAC Spinulose Wood Fern
Dryopteris cristata (L.) Gray FACW Crested Wood Fern
Dryopteris expansa (K. Presl) Fraser‐Jenkins & Jermy FACW Spreading Wood Fern
Dudleya variegata (S. Wats.) Moran FACU Variegated Live‐Forever
Dulichium arundinaceum (L.) Britt. OBL Three‐Way Sedge
Dysphania ambrosioides (L.) Mosyakin & Clemants FAC Mexican‐Tea
Dysphania botrys (L.) Mosyakin & Clemants FACU Jerusalem‐Oak
Echinochloa colona (L.) Link FAC Jungle‐Rice
Echinochloa crus‐galli (L.) Beauv. FACW Large Barnyard Grass
Echinochloa crus‐pavonis (Kunth) J.A. Schultes FACW Gulf Cock's‐Spur Grass
Echinochloa muricata (Beauv.) Fern. FACW Rough Barnyard Grass
Echinochloa oryzicola (Vasinger) Vasinger FACW Rice‐Field Grass
Echinochloa oryzoides (Ard.) Fritsch OBL Early Water Grass
Echinochloa walteri (Pursh) Heller OBL Long‐Awn Cock's‐Spur Grass
Echinocystis lobata (Michx.) Torr. & Gray FACU Wild Cucumber
Echinodorus berteroi (Spreng.) Fassett OBL Upright Burrhead
Echinopepon wrightii (Gray) S. Wats. FAC Wild Balsam‐Apple
Eclipta prostrata (L.) L. FAC False Daisy
Egeria densa Planch. OBL Brazilian‐Waterweed
Eichhornia crassipes (Mart.) Solms OBL Common Water‐Hyacinth
Elaeagnus angustifolia L. FAC Russian‐Olive
Elaeagnus commutata Bernh. ex Rydb. FAC American Silver‐Berry
Elatine ambigua Wight OBL Asian Waterwort
Elatine brachysperma Gray OBL Short‐Seed Waterwort
Elatine californica Gray OBL California Waterwort
Elatine chilensis Gray OBL Chilean Waterwort
Elatine heterandra Mason OBL Mosquito Waterwort
Elatine rubella Rydb. OBL Red‐Stem Waterwort
Eleocharis acicularis (L.) Roemer & J.A. Schultes OBL Needle Spike‐Rush
Eleocharis albida Torr. OBL White Spike‐Rush
Eleocharis atropurpurea (Retz.) J.& K. Presl FACW Purple Spike‐Rush
Eleocharis bella (Piper) Svens. FACW Delicate Spike‐Rush
Eleocharis bolanderi Gray FACW Bolander's Spike‐Rush
Eleocharis compressa Sullivant FACW Flat‐Stem Spike‐Rush
Eleocharis cylindrica Buckl. OBL Cylinder Spike‐Rush
Eleocharis elliptica Kunth OBL Elliptic Spike‐Rush
Eleocharis engelmannii Steud. OBL Engelmann's Spike‐Rush
Eleocharis flavescens (Poir.) Urban OBL Yellow Spike‐Rush
Eleocharis geniculata (L.) Roemer & J.A. Schultes OBL Capitate Spike‐Rush
Eleocharis montana (Kunth) Roemer & J.A. Schultes OBL Mountain Spike‐Rush
Eleocharis montevidensis Kunth FACW Sand Spike‐Rush
Eleocharis obtusa (Willd.) J.A. Schultes OBL Blunt Spike‐Rush
Eleocharis pachycarpa Desv. OBL Black‐Sand Spike‐Rush
Eleocharis palustris (L.) Roemer & J.A. Schultes OBL Common Spike‐Rush
Eleocharis parishii Britt. FACW Parish's Spike‐Rush
Eleocharis parvula (Roemer & J.A. Schultes) Link ex Bluff, Nee OBL Little‐Head Spike‐Rush
Eleocharis quadrangulata (Michx.) Roemer & J.A. Schultes OBL Square‐Stem Spike‐Rush
Eleocharis quinqueflora (F.X. Hartmann) Schwarz OBL Few‐Flower Spike‐Rush
Eleocharis radicans (A. Dietr.) Kunth OBL Rooted Spike‐Rush
Eleocharis rostellata (Torr.) Torr. OBL Beaked Spike‐Rush
Eleocharis suksdorfiana Beauv. OBL Suksdorf's Spike‐Rush
Eleocharis torticulmis S.G. Sm. OBL Twist‐Stem Spike‐Rush
Ellisia nyctelea (L.) L. FACU Aunt Lucy
Elodea bifoliata St. John OBL Two‐Leaf Waterweed
Elodea canadensis Michx. OBL Canadian Waterweed
Elodea nuttallii (Planch.) St. John OBL Western Waterweed
Elymus canadensis L. FAC Nodding Wild Rye
Elymus curvatus Piper FAC Awnless Wild Rye
Elymus elymoides (Raf.) Swezey FACU Western Bottle‐Brush Grass
Elymus glaucus Buckl. FACU Blue Wild Rye
Elymus hystrix L. FACU Eastern Bottle‐Brush Grass
Elymus repens (L.) Gould FAC Creeping Wild Rye
Elymus trachycaulus (Link) Gould ex Shinners FACU Slender Wild Rye
Elymus virginicus L. FACW Virginia Wild Rye
Elymus wawawaiensis J. Carlson & Barkworth FACU Wawawai Wild Rye
Empetrum nigrum L. FAC Black Crowberry
Epilobium anagallidifolium Lam. FACU Pimpernel Willowherb
Epilobium campestre (Jepson) Hoch & W.L. Wagner OBL Smooth Willowherb
Epilobium ciliatum Raf. FACW Fringed Willowherb
Epilobium clavatum Trel. FACU Talus Willowherb
Epilobium cleistogamum (Curran) Hoch & Raven OBL Selfing Willowherb
Epilobium densiflorum (Lindl.) Hoch & Raven FACW Dense‐Flower Willowherb
Epilobium glaberrimum Barbey FACW Glaucous Willowherb
Epilobium halleanum Hausskn. FACW Glandular Willowherb
Epilobium hirsutum L. FACW Codlins‐and‐Cream
Epilobium hornemannii Reichenb. FACW Hornemann's Willowherb
Epilobium howellii Hoch FACW Yuba Pass Willowherb
Epilobium lactiflorum Hausskn. FACW White‐Flower Willowherb
Epilobium leptocarpum Hausskn. FACW Slender‐Fruit Willowherb
Epilobium leptophyllum Raf. FACW Bog Willowherb
Epilobium luteum Pursh FACW Yellow Willowherb
Epilobium minutum Lindl. ex Lehm. FACU Chaparral Willowherb
Epilobium obcordatum Gray FACU Rockfringe
Epilobium oreganum Greene OBL Grants Pass Willowherb
Epilobium oregonense Hausskn. OBL Oregon Willowherb
Epilobium pallidum (Eastw.) Hoch & Raven FAC Large‐Flower Willowherb
Epilobium palustre L. OBL Marsh Willowherb
Epilobium saximontanum Hausskn. FACW Rocky Mountain Willowherb
Epilobium siskiyouense (Munz) Hoch & Raven FACW Siskiyou Willowherb
Epilobium suffruticosum Nutt. FACU Shrubby Willowherb
Epilobium torreyi (S. Wats.) Hoch & Raven FACW Brook Willowherb
Epipactis gigantea Dougl. ex Hook. OBL Giant Helleborine
Epipactis helleborine (L.) Crantz FACU Helleborine
Equisetum arvense L. FAC Field Horsetail
Equisetum fluviatile L. OBL Water Horsetail
Equisetum hyemale L. FACW Tall Scouring‐Rush
Equisetum laevigatum A. Braun FACW Smooth Scouring‐Rush
Equisetum palustre L. FACW Marsh Horsetail
Equisetum scirpoides Michx. FAC Dwarf Scouring‐Rush
Equisetum sylvaticum L. FAC Woodland Horsetail
Equisetum telmateia Ehrh. FACW Giant Horsetail
Equisetum variegatum Schleich. ex F. Weber & D.M.H. Mohr FACW Variegated Scouring‐Rush
Equisetum X ferrissii Clute (pro sp.) FACW
Equisetum X litorale Kühlewein ex Rupr. (pro sp.) OBL
Equisetum X nelsonii (A.A. Eat.) Schaffn. (pro sp.) FACW
Eragrostis cilianensis (All.) Vign. ex Janchen FACU Stink Grass
Eragrostis frankii C.A. Mey. ex Steud. FACW Sandbar Love Grass
Eragrostis hypnoides (Lam.) B.S.P. OBL Teal Love Grass
Eragrostis lugens Nees FACU Mourning Love Grass
Eragrostis lutescens Scribn. FACU Six‐Weeks Love Grass
Eragrostis mexicana (Hornem.) Link FACU Mexican Love Grass
Eragrostis pectinacea (Michx.) Nees ex Jedw. FAC Purple Love Grass
Eragrostis pilosa (L.) Beauv. FACU Indian Love Grass
Erechtites hieraciifolius (L.) Raf. ex DC. FACU American Burnweed
Eremogone capillaris (Poir.) Fenzl FACU Slender Mountain Sandwort
Erigeron acris L. FACU Bitter Fleabane
Erigeron annuus (L.) Pers. FACU Eastern Daisy Fleabane
Erigeron coulteri Porter FACW Large Mountain Fleabane
Erigeron elatior (Gray) Greene FAC Tall Fleabane
Erigeron flagellaris Gray FACU Trailing Fleabane
Erigeron glabellus Nutt. FAC Streamside Fleabane
Erigeron glacialis (Nutt.) A. Nels. FAC Glacier Fleabane
Erigeron glaucus Ker‐Gawl. FACU Seaside Fleabane
Erigeron humilis Graham FACW Arctic Alpine Fleabane
Erigeron kachinensis Welsh & Moore OBL Kachina Fleabane
Erigeron karvinskianus DC. FAC Latin American Fleabane
Erigeron lanatus Hook. FACU Woolly Fleabane
Erigeron lonchophyllus Hook. FACW Short‐Ray Fleabane
Erigeron melanocephalus (A. Nels.) A. Nels. FAC Black‐Head Fleabane
Erigeron nivalis Nutt. FAC Scotter's Fleabane
Erigeron philadelphicus L. FACU Philadelphia Fleabane
Erigeron strigosus Muhl. ex Willd. FACU Prairie Fleabane
Eriocaulon cinereum R. Br. OBL Ashy Pipewort
Eriocaulon microcephalum Kunth OBL Small‐Head Pipewort
Eriochloa acuminata (J. Presl) Kunth FACW Taper‐Tip Cup Grass
Eriochloa aristata Vasey FACW Bearded Cup Grass
Eriochloa contracta A.S. Hitchc. FAC Prairie Cup Grass
Eriochloa fatmensis (Hochst. & Steud.) W.D. Clayton FAC Tropical Cup Grass
Eriogonum ampullaceum J.T. Howell FACU Mono Wild Buckwheat
Eriogonum argophyllum Reveal FACW Sulphur Hot Springs Wild Buckwheat
Eriogonum ovalifolium Nutt. FACU Cushion Wild Buckwheat
Eriophorum angustifolium Honckeny OBL Tall Cotton‐Grass
Eriophorum callitrix Cham. ex C.A. Mey. FACW Arctic Cotton‐Grass
Eriophorum chamissonis C.A. Mey. OBL Chamisso's Cotton‐Grass
Eriophorum crinigerum (Gray) Beetle OBL Meadow's Cotton‐Grass
Eriophorum gracile W.D.J. Koch OBL Slender Cotton‐Grass
Eriophorum scheuchzeri Hoppe OBL White Cotton‐Grass
Eriophorum viridicarinatum (Engelm.) Fern. OBL Tassel Cotton‐Grass
Erodium botrys (Cav.) Bertol. FACU Long‐Beak Stork's‐Bill
Eryngium alismifolium Greene FACW Modoc Eryngo
Eryngium aristulatum Jepson OBL California Eryngo
Eryngium armatum (S. Wats.) Coult. & Rose FACW Coastal Eryngo
Eryngium articulatum Hook. OBL Bee‐Thistle
Eryngium castrense Jepson OBL Great Valley Eryngo
Eryngium constancei Sheikh OBL Loch Lomond Eryngo
Eryngium heterophyllum Engelm. FACW Wright's Eryngo
Eryngium lemmonii Coult. & Rose FAC Chiricahua Mountain Eryngo
Eryngium mathiasiae Sheikh OBL Mathias' Eryngo
Eryngium nasturtiifolium Juss. ex Delar. f. FACW Hierba‐Del‐Sapo
Eryngium petiolatum Hook. OBL Rush‐Leaf Eryngo
Eryngium phyteumae Delar. f. OBL Huachuca Mountain Eryngo
Eryngium pinnatisectum Jepson OBL Tuolumne Eryngo
Eryngium racemosum Jepson OBL Delta Eryngo
Eryngium sparganophyllum Hemsl. OBL Arizona Eryngo
Eryngium spinosepalum Mathias FACW Spiny‐Sepal Eryngo
Eryngium vaseyi Coult. & Rose FACW Coyote‐Thistle
Erysimum cheiranthoides L. FACU Worm‐Seed Wallflower
Erythronium grandiflorum Pursh FACU Yellow Avalanche‐Lily
Erythronium revolutum Sm. FAC Mahogany Fawn‐Lily
Eucalyptus camaldulensis Dehnhardt FAC River Red Gum
Euonymus occidentalis Nutt. ex Torr. FACW Western Wahoo
Euphorbia spathulata Lam. FAC Warty Spurge
Euphorbia tirucalli L. FACU False Caper
Eurybia merita (A. Nels.) Nesom FACU Behring Wood‐Aster
Eurybia sibirica (L.) Nesom FAC Siberian Wood‐Aster
Eustoma exaltatum (L.) Salisb. OBL Catchfly Prairie‐Gentian
Euthamia graminifolia (L.) Nutt. FAC Flat‐Top Goldentop
Euthamia occidentalis Nutt. FACW Western Goldentop
Eutrochium maculatum (L.) E. Lamont OBL Spotted Trumpetweed
Fallopia convolvulus (L.) A. Löve FACU Black‐Bindweed
Fallopia japonica (Houtt.) R. Decr. FACU Japanese Black‐Bindweed
Fallopia sachalinensis (F. Schmidt) R. Decr. FACU Giant Black‐Bindweed
Fatoua villosa (Thunb.) Nakai FAC Hairy Crabweed
Festuca arundinacea Schreb. FACU
Festuca californica Vasey FACU California Fescue
Festuca idahoensis Elmer FACU Bluebunch Fescue
Festuca ovina L. FACU Sheep Fescue
Festuca pratensis Huds. FACU Meadow Fescue
Festuca rubra L. FAC Red Fescue
Festuca subulata Trin. FACU Bearded Fescue
Ficus carica L. FACU Common Fig
Fimbristylis annua (All.) Roemer & J.A. Schultes FAC Annual Fimbry
Fimbristylis autumnalis (L.) Roemer & J.A. Schultes OBL Slender Fimbry
Fimbristylis littoralis Gaud. OBL Grass‐Like Fimbry
Fimbristylis puberula (Michx.) Vahl FACW Hairy Fimbry
Fimbristylis thermalis S. Wats. OBL Hot Springs Fimbry
Fimbristylis vahlii (Lam.) Link FACW Vahl's Fimbry
Flaveria campestris J.R. Johnston FACW Alkali Yellowtops
Flaveria chlorifolia Gray FACW Clasping Yellowtops
Flaveria trinervia (Spreng.) C. Mohr FAC Clustered Yellowtops
Fleischmannia sonorae (Gray) King & H.E. Robins. FAC Sonoran Slender‐Thoroughwort
Floerkea proserpinacoides Willd. FACW False Mermaidweed
Forestiera pubescens Nutt. FACU Stretchberry
Fragaria virginiana Duchesne FACU Virginia Strawberry
Frangula alnus P. Mill. FAC Glossy False Buckthorn
Frangula betulifolia (Greene) V. Grub. FAC Birch‐Leaf False Buckthorn
Frangula purshiana (DC.) Cooper FACU Cascara False Buckthorn
Frankenia palmeri S. Wats. FACW Palmer's Sea‐Heath
Frankenia salina (Molina) I.M. Johnston FACW Alkali Sea‐Heath
Fraxinus americana L. FACU White Ash
Fraxinus latifolia Benth. FACW Oregon Ash
Fraxinus pennsylvanica Marsh. FACW Green Ash
Fraxinus velutina Torr. FAC Velvet Ash
Fritillaria agrestis Greene FAC Stinkbells
Fuchsia magellanica Lam. FACU Hardy Fuchsia
Fuirena simplex Vahl OBL Western Umbrella Sedge
Fuirena squarrosa Michx. OBL Hairy Umbrella Sedge
Funastrum cynanchoides (Dcne.) Schlechter FACU Fringed Twinevine
Gaillardia flava Rydb. FACU Yellow Blanket‐Flower
Gaillardia pulchella Foug. FACU Firewheel
Galeopsis tetrahit L. FACU Brittle‐Stem Hemp‐Nettle
Galium aparine L. FACU Sticky‐Willy
Galium boreale L. FACU Northern Bedstraw
Galium divaricatum Pourret ex Lam. FACU Lamarck's Bedstraw
Galium mexicanum Kunth FAC Mexican Bedstraw
Galium microphyllum Gray FACU Bracted Bedstraw
Galium trifidum L. FACW Three‐Petal Bedstraw
Galium triflorum Michx. FACU Fragrant Bedstraw
Galium uncinulatum DC. FAC Bristly Bedstraw
Gamochaeta purpurea (L.) Cabrera FACU Spoon‐Leaf Purple Everlasting
Gastridium phleoides (Nees & Meyen) C.E. Hubbard FACU Nit Grass
Gaultheria humifusa (Graham) Rydb. FACW Alpine Spicy‐Wintergreen
Gaultheria ovatifolia Gray FAC Western Teaberry
Gaultheria shallon Pursh FACU Salal
Gaura neomexicana Woot. FACW New Mexico Beeblossom
Gayophytum humile Juss. FAC Dwarf Groundsmoke
Gayophytum racemosum Torr. & Gray FAC Black‐Foot Groundsmoke
Gentiana affinis Griseb. FACU Pleated Gentian
Gentiana algida Pallas FACW Whitish Gentian
Gentiana calycosa Griseb. FACW Rainier Pleated Gentian
Gentiana douglasiana Bong. OBL Swamp Gentian
Gentiana fremontii Torr. FACW Moss Gentian
Gentiana glauca Pallas FAC Pale Gentian
Gentiana newberryi Gray FACW Alpine Gentian
Gentiana parryi Engelm. FAC Parry's Gentian
Gentiana prostrata Haenke FACW Pygmy Gentian
Gentiana sceptrum Griseb. OBL King's‐Scepter Gentian
Gentiana setigera Gray OBL Mendocino Gentian
Gentianella amarella (L.) Börner FACW Autumn Dwarf‐Gentian
Gentianella propinqua (Richards.) J. Gillett FACW Four‐Part Dwarf‐Gentian
Gentianella tenella (Rottb.) Börner FACW Dane's Dwarf‐Gentian
Gentianella wrightii (Gray) Holub OBL Wright's Dwarf‐Gentian
Gentianopsis barbellata (Engelm.) Iltis FACW Perennial Fringed‐Gentian
Gentianopsis holopetala (Gray) Iltis OBL Sierran Fringed‐Gentian
Gentianopsis simplex (Gray) Iltis FACW One‐Flower Fringed‐Gentian
Gentianopsis thermalis (Kuntze) Iltis FACW Rocky Mountain Fringed‐Gentian
Geocaulon lividum (Richards.) Fern. FAC False Toadflax
Geranium caespitosum James FAC Purple Cluster Crane's‐Bill
Geranium californicum G.N. & F.F. Jones FAC California Crane's‐Bill
Geranium richardsonii Fisch. & Trautv. FACU White Crane's‐Bill
Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey. FAC Sticky Purple Crane's‐Bill
Geum aleppicum Jacq. FAC Yellow Avens
Geum macrophyllum Willd. FACW Large‐Leaf Avens
Geum rivale L. FACW Purple Avens
Geum rossii (R. Br.) Ser. FACU Ross' Avens
Geum triflorum Pursh FACU Old‐Man's‐Whiskers
Githopsis diffusa Gray FAC San Gabriel Bluecup
Githopsis specularioides Nutt. FACU Common Bluecup
Glaux maritima L. FACW Sea‐Milkwort
Glechoma hederacea L. FACU Groundivy
Gleditsia triacanthos L. FAC Honey‐Locust
Glinus lotoides L. OBL Lotus Sweetjuice
Glinus radiatus (Ruiz & Pavón) Rohrb. FACW Spreading Sweetjuice
Glyceria borealis (Nash) Batchelder OBL Small Floating Manna Grass
Glyceria declinata Brébiss. FACW Waxy Manna Grass
Glyceria elata (Nash ex Rydb.) M.E. Jones OBL Tall Manna Grass
Glyceria fluitans (L.) R. Br. OBL Water Manna Grass
Glyceria grandis S. Wats. OBL American Manna Grass
Glyceria leptostachya Buckl. OBL Slender‐Spike Manna Grass
Glyceria striata (Lam.) A.S. Hitchc. OBL Fowl Manna Grass
Glyceria X occidentalis (Piper) J.C. Nels. OBL
Glycyrrhiza lepidota Pursh FAC American Licorice
Gnaphalium exilifolium A. Nels. FACW Slender Cudweed
Gnaphalium palustre Nutt. FACW Western Marsh Cudweed
Gnaphalium uliginosum L. FAC Marsh Cudweed
Goodmania luteola (Parry) Reveal & Ertter FACW Yellow Spinecape
Goodyera oblongifolia Raf. FACU Green‐Leaf Rattlesnake‐Plantain
Goodyera repens (L.) R. Br. ex Ait. f. FACU Dwarf Rattlesnake‐Plantain
Graphephorum wolfii (Vasey) Vasey ex Coult. FACU
Gratiola ebracteata Benth. ex A. DC. OBL Bractless Hedge‐Hyssop
Gratiola heterosepala Mason & Bacig. OBL Boggs Lake Hedge‐Hyssop
Gratiola neglecta Torr. OBL Clammy Hedge‐Hyssop
Grindelia ciliata (Nutt.) Spreng. FACU Spanishgold
Grindelia fraxinopratensis Reveal & Beatley FACW Ash Meadows Gumweed
Grindelia hirsutula Hook. & Arn. FACW Hairy Gumweed
Grindelia integrifolia DC. FACW Puget Sound Gumweed
Grindelia squarrosa (Pursh) Dunal FACU Curly‐Cup Gumweed
Gymnocarpium dryopteris (L.) Newman FAC Northern Oak Fern
Gymnosteris parvula Heller FAC Small‐Flower Starlet
Hackelia floribunda (Lehm.) I.M. Johnston FACU Many‐Flower Stickseed
Hackelia micrantha (Eastw.) J.L. Gentry FACU Blue Stickseed
Hainardia cylindrica (Willd.) W. Greuter FACW Barb Grass
Halenia rothrockii Gray FAC Mt. Graham Spurred‐Gentian
Halodule wrightii Aschers. OBL Shoalweed
Haloragis erecta (Banks ex Murr.) Oken FAC Erect Seaberry
Hamamelis virginiana L. FACU American Witch‐Hazel
Harrimanella stelleriana (Pallas) Coville FACU Alaska Bell‐Heather
Hastingsia alba (Dur.) S. Wats. OBL White Rush‐Lily
Hedysarum alpinum L. FACU Alpine Sweet‐Vetch
Heimia salicifolia (Kunth) Link FACW Shrubby‐Yellowcrest
Helenium amarum (Raf.) H. Rock FACU Yellowdicks
Helenium arizonicum Blake FACW Arizona Sneezeweed
Helenium autumnale L. FACW Fall Sneezeweed
Helenium bigelovii Torr. & Gray FACW Bigelow's Sneezeweed
Helenium bolanderi Gray FACW Coastal Sneezeweed
Helenium microcephalum DC. FACW Small‐Head Sneezeweed
Helenium puberulum DC. FACW Rosilla
Helenium thurberi Gray OBL Thurber's Sneezeweed
Helianthella quinquenervis (Hook.) Gray FACU Nodding Dwarf‐Sunflower
Helianthus annuus L. FACU Common Sunflower
Helianthus bolanderi Gray FAC Bolander's Sunflower
Helianthus californicus DC. OBL California Sunflower
Helianthus ciliaris DC. FAC Texas‐Blueweed
Helianthus exilis Gray FACU Serpentine Sunflower
Helianthus grosseserratus Martens FAC Saw‐Tooth Sunflower
Helianthus nuttallii Torr. & Gray FACW Nuttall's Sunflower
Helianthus paradoxus Heiser FACW Trans‐Pecos Sunflower
Heliopsis helianthoides (L.) Sweet FACU Smooth Oxeye
Heliotropium curassavicum L. FACU Seaside Heliotrope
Heliotropium glabriusculum (Torr.) Gray FACW Green‐Eye Heliotrope
Heliotropium greggii Torr. FAC Fragrant Heliotrope
Heliotropium molle (Torr.) I.M. Johnston FACW Soft Heliotrope
Heliotropium procumbens P. Mill. FACW Four‐Spike Heliotrope
Helminthotheca echioides (L.) Holub FACU Akan Asante
Hemarthria altissima (Poir.) Stapf & C.E. Hubbard FACW Limpo Grass
Hemerocallis fulva (L.) L. FACU Orange Day‐Lily
Heracleum maximum Bartr. FACW American Cow‐Parsnip
Hesperevax caulescens (Benth.) Gray OBL Dwarf Pygmy‐Cudweed
Hesperevax sparsiflora (Gray) Greene FACU Erect Pygmy‐Cudweed
Hesperis matronalis L. FACU Mother‐of‐the‐Evening
Hesperochiron californicus (Benth.) S. Wats. FACU California Monkey‐Fiddle
Hesperochiron pumilus (Dougl. ex Griseb.) Porter FAC Dwarf Monkey‐Fiddle
Heteranthera dubia (Jacq.) MacM. OBL Grass‐Leaf Mud‐Plantain
Heteranthera limosa (Sw.) Willd. OBL Blue Mud‐Plantain
Heteranthera reniformis Ruiz & Pavón OBL Kidney‐Leaf Mud‐Plantain
Heterocodon rariflorum Nutt. FACW Western Pearlflower
Heteropogon contortus (L.) Beauv. ex Roemer & J.A. Schultes FACU Twisted Tanglehead
Heterotheca oregona (Nutt.) Shinners FACU Oregon False Golden‐Aster
Heterotheca shevockii (Semple) Semple FACU Shevock's False Golden‐Aster
Heuchera chlorantha Piper FACU Tall Alumroot
Hibiscus moscheutos L. OBL Crimson‐Eyed Rose‐Mallow
Hieracium triste Willd. ex Spreng. FACU Woolly Hawkweed
Hippuris montana Ledeb. FACW Mountain Mare's‐Tail
Hippuris vulgaris L. OBL Common Mare's‐Tail
Hoffmannseggia glauca (Ortega) Eifert FACU Waxy Rush‐Pea
Hoita macrostachya (DC.) Rydb. OBL Large Leather‐Root
Hoita orbicularis (Lindl.) Rydb. OBL Round‐Leaf Leather‐Root
Holcus lanatus L. FAC Common Velvet Grass
Holcus mollis L. FAC Creeping Velvet Grass
Holodiscus discolor (Pursh) Maxim. FACU Creambush
Holozonia filipes (Hook. & Arn.) Greene FACU Whitecrown
Hopia obtusa (Kunth) F. Zuloaga & O. Morrone FACU
Hordeum arizonicum Covas FAC Arizona Barley
Hordeum brachyantherum Nevski FACW Meadow Barley
Hordeum depressum (Scribn. & J.G. Sm.) Rydb. FACW Dwarf Barley
Hordeum intercedens Nevski FAC Bob‐Tail Barley
Hordeum jubatum L. FAC Fox‐Tail Barley
Hordeum marinum Huds. FAC Seaside Barley
Hordeum murinum L. FACU Wall Barley
Hordeum pusillum Nutt. FACU Little Barley
Horkelia bolanderi Gray FAC Border Honeydew
Horkelia congesta Dougl. ex Hook. FACU Sierran Honeydew
Horkelia yadonii Ertter FACU Santa Lucia Honeydew
Hornungia procumbens (L.) Hayek FAC Ovalpurse
Houstonia wrightii Gray FACU Pygmy Bluet
Howellia aquatilis Gray OBL Water Howellwort
Humulus lupulus L. FACU Common Hop
Huperzia haleakalae (Brack.) Holub FACU Pacific Fir‐Moss
Huperzia lucidula (Michx.) Trevisan FACW Shining Fir‐Moss
Hydrilla verticillata (L. f.) Royle OBL Water‐Thyme
Hydrocotyle prolifera Kellogg OBL Proliferous Marsh‐Pennywort
Hydrocotyle ranunculoides L. f. OBL Floating Marsh‐Pennywort
Hydrocotyle sibthorpioides Lam. FACW Lawn Marsh‐Pennywort
Hydrocotyle umbellata L. OBL Many‐Flower Marsh‐Pennywort
Hydrocotyle verticillata Thunb. OBL Whorled Marsh‐Pennywort
Hydrophyllum fendleri (Gray) Heller FAC Fendler's Waterleaf
Hydrophyllum occidentale (S. Wats.) Gray FACW Squaw‐Lettuce
Hydrophyllum tenuipes Heller FACW Pacific Waterleaf
Hymenoxys hoopesii (Gray) Bierner FAC Owl's‐Claws
Hypericum anagalloides Cham. & Schlecht. OBL Tinker's‐Penny
Hypericum boreale (Britt.) Bickn. OBL Northern St. John's‐Wort
Hypericum majus (Gray) Britt. FACW Greater Canadian St. John's‐Wort
Hypericum mutilum L. FACW Dwarf St. John's‐Wort
Hypericum perforatum L. FACU Common St. John's‐Wort
Hypericum scouleri Hook. FACW Scouler's St. John's‐Wort
Hypochaeris radicata L. FACU Hairy Cat's‐Ear
Hypoxis hirsuta (L.) Coville FACW Eastern Yellow Star‐Grass
Iliamna grandiflora (Rydb.) Wiggins FACW Large‐Flower Wild Hollyhock
Iliamna rivularis (Dougl. ex Hook.) Greene FACW Streambank Wild Hollyhock
Impatiens aurella Rydb. FACW Pale‐Yellow Touch‐Me‐Not
Impatiens capensis Meerb. FACW Spotted Touch‐Me‐Not
Impatiens ecalcarata Blank. FACW Spurless Touch‐Me‐Not
Impatiens glandulifera Royle FACW Policeman's‐Helmet
Imperata brevifolia Vasey FAC California Satintail
Indigofera lindheimeriana Scheele FAC Lindheimer's Indigo
Inula helenium L. FAC Elecampane
Ipomoea aquatica Forssk. OBL Swamp‐Cabbage
Ipomoea cairica (L.) Sweet FACU Mile‐a‐Minute‐Vine
Ipomoea cordatotriloba Dennst. FAC Tievine
Ipomoea hederacea Jacq. FACU Ivy‐Leaf Morning‐Glory
Ipomoea indica (Burm. f.) Merr. FAC Ocean‐Blue Morning‐Glory
Ipomoea lacunosa L. FACW Whitestar
Ipomoea quamoclit L. FACU Cypress‐Vine
Ipomoea triloba L. FACU Littlebell
Iris hartwegii Baker FACU Rainbow Iris
Iris missouriensis Nutt. FACW Rocky Mountain Iris
Iris pseudacorus L. OBL Pale‐Yellow Iris
Isocoma acradenia (Greene) Greene FACU Alkali Jimmyweed
Isocoma arguta Greene FACU Contra Costa Jimmyweed
Isocoma menziesii (Hook. & Arn.) Nesom FAC Variable Jimmyweed
Isoetes bolanderi Engelm. OBL Bolander's Quillwort
Isoetes howellii Engelm. OBL Howell's Quillwort
Isoetes melanopoda Gay & Durieu ex Durieu OBL Black‐Foot Quillwort
Isoetes minima A.A. Eat. FACW Midget Quillwort
Isoetes nuttallii A. Braun ex Engelm. OBL Nuttall's Quillwort
Isoetes occidentalis Henderson OBL Western Quillwort
Isoetes orcuttii A.A. Eat. OBL Orcutt's Quillwort
Isoetes tenella Léman OBL Spiny‐Spore Quillwort
Isolepis carinata Hook. & Arn. ex Torr. OBL Keeled Lateral‐Bulrush
Isolepis cernua (Vahl) Roemer & J.A. Schultes OBL Low Lateral‐Bulrush
Isolepis prolifera R. Br. OBL Proliferous Lateral‐Bulrush
Isolepis setacea (L.) R. Br. FACW Bristle‐Leaf Lateral‐Bulrush
Iva annua L. FAC Annual Marsh‐Elder
Iva axillaris Pursh FAC Deer‐Root
Iva hayesiana Gray FACW San Diego Marsh‐Elder
Ivesia kingii S. Wats. FAC King's Mousetail
Ivesia lycopodioides Gray FAC Clubmoss Mousetail
Ivesia pickeringii Torr. ex Gray OBL Silky Mousetail
Ivesia pityocharis Ertter FACW Pine Nut Mountain Mousetail
Ivesia sericoleuca (Rydb.) Rydb. FAC Plumas Mousetail
Jamesia americana Torr. & Gray FACU Five‐Petal Cliffbush
Jaumea carnosa (Less.) Gray OBL Marsh Jaumea
Jensia yosemitana (Parry ex Gray) B.G. Baldwin FACU Yosemite Annual‐Tarweed
Juglans californica S. Wats. FAC Southern California Walnut
Juglans cinerea L. FACU White Walnut
Juglans hindsii (Jepson) Jepson ex R.E. Sm. FAC Northern California Walnut
Juglans major (Torr.) Heller FAC Arizona Walnut
Juglans microcarpa Berl. FAC Little Walnut
Juncus acuminatus Michx. OBL Knotty‐Leaf Rush
Juncus acutus L. FACW Spiny Rush
Juncus albescens (Lange) Fern. OBL Northern White Rush
Juncus alpinoarticulatus Chaix OBL Northern Green Rush
Juncus arcticus Willd. FACW Arctic Rush
Juncus articulatus L. OBL Joint‐Leaf Rush
Juncus biglumis L. OBL Two‐Flower Rush
Juncus bolanderi Engelm. OBL Bolander's Rush
Juncus brachyphyllus Wieg. FAC Short‐Leaf Rush
Juncus brevicaudatus (Engelm.) Fern. OBL Narrow‐Panicle Rush
Juncus breweri Engelm. FACW Brewer's Rush
Juncus bryoides F.J. Herm. OBL Moss Dwarf Rush
Juncus bufonius L. FACW Toad Rush
Juncus capillaris F.J. Herm. FACW Hairy‐Stem Dwarf Rush
Juncus capitatus Weigel FACU Leafy‐Bract Dwarf Rush
Juncus castaneus Sm. FACW Chestnut Rush
Juncus chlorocephalus Engelm. FACW Green‐Head Rush
Juncus compressus Jacq. OBL Round‐Fruit Rush
Juncus confusus Coville FAC Colorado Rush
Juncus cooperi Engelm. FACW Cooper's Rush
Juncus covillei Piper FACW Coville's Rush
Juncus dichotomus Ell. FACW Forked Rush
Juncus diffusissimus Buckl. FACW Slim‐Pod Rush
Juncus digitatus C. Witham & P. Zika OBL
Juncus drummondii E. Mey. FACW Drummond's Rush
Juncus dubius Engelm. FACW Mariposa Rush
Juncus dudleyi Wieg. FAC Dudley's Rush
Juncus duranii Ewan OBL Duran's Rush
Juncus effusus L. FACW Lamp Rush
Juncus ensifolius Wikstr. FACW Dagger‐Leaf Rush
Juncus falcatus E. Mey. FACW Sickle‐Leaf Rush
Juncus filiformis L. FACW Thread Rush
Juncus gerardii Loisel. FACW Saltmarsh Rush
Juncus hallii Engelm. FAC Hall's Rush
Juncus hemiendytus F.J. Herm. OBL Herman's Dwarf Rush
Juncus interior Wieg. FAC Inland Rush
Juncus kelloggii Engelm. FACW Kellogg's Dwarf Rush
Juncus leiospermus F.J. Herm. OBL Red Bluff Dwarf Rush
Juncus lesueurii Boland. FACW Salt Rush
Juncus longistylis Torr. FACW Long‐Style Rush
Juncus luciensis Ertter OBL Santa Lucia Dwarf Rush
Juncus macrandrus Coville OBL Long‐Anther Rush
Juncus macrophyllus Coville FACW Long‐Leaf Rush
Juncus marginatus Rostk. FACW Grass‐Leaf Rush
Juncus mertensianus Bong. OBL Mertens' Rush
Juncus mexicanus Willd. ex J.A. & J.H. Schultes FACW Mexican Rush
Juncus nevadensis S. Wats. FACW Sierran Rush
Juncus nodatus Coville OBL Stout Rush
Juncus nodosus L. OBL Knotted Rush
Juncus occidentalis (Coville) Wieg. FACW Western Rush
Juncus orthophyllus Coville FACW Straight‐Leaf Rush
Juncus oxymeris Engelm. FACW Pointed Rush
Juncus parryi Engelm. FAC Parry's Rush
Juncus patens E. Mey. FACW Spreading Rush
Juncus phaeocephalus Engelm. FACW Brown‐Head Rush
Juncus regelii Buch. FACW Regel's Rush
Juncus rugulosus Engelm. OBL Wrinkled Rush
Juncus scirpoides Lam. FACW Needle‐Pod Rush
Juncus supiniformis Engelm. OBL Hairy‐Leaf Rush
Juncus tenuis Willd. FACW Lesser Poverty Rush
Juncus textilis Buch. FACW Basket Rush
Juncus tiehmii Ertter FACW Nevada Rush
Juncus torreyi Coville FACW Torrey's Rush
Juncus triformis Engelm. FACW Yosemite Dwarf Rush
Juncus triglumis L. FACW Three‐Flower Rush
Juncus uncialis Greene OBL Inch‐High Rush
Juncus vaseyi Engelm. FACW Vasey's Rush
Juncus xiphioides E. Mey. OBL Iris‐Leaf Rush
Juniperus communis L. FACU Common Juniper
Juniperus deppeana Steud. FACU Alligator Juniper
Juniperus horizontalis Moench FACU Creeping Juniper
Juniperus virginiana L. FACU Eastern Red‐Cedar
Kalmia microphylla (Hook.) Heller OBL Alpine‐Laurel
Kobresia myosuroides (Vill.) Fiori FACU Pacific Bog Sedge
Kobresia sibirica (Turcz. ex Ledeb.) Boeckl. FAC Siberian Bog Sedge
Kobresia simpliciuscula (Wahlenb.) Mackenzie FACW Simple Bog Sedge
Koenigia islandica L. OBL Island‐Purslane
Krigia biflora (Walt.) Blake FACU Two‐Flower Dwarf‐Dandelion
Kumlienia hystricula (Gray) Greene OBL Waterfall False Buttercup
Kummerowia stipulacea (Maxim.) Makino FACU Korean‐Clover
Kummerowia striata (Thunb.) Schindl. FACU Japanese‐Clover
Kyllinga brevifolia Rottb. FACW Short‐Leaf Spike Sedge
Kyllinga odorata Vahl FACW Fragrant Spike Sedge
Lachnagrostis filiformis (G. Forst.) Trin. FACW Common Blown Grass
Lactuca biennis (Moench) Fern. FAC Wild Blue Lettuce
Lactuca canadensis L. FACU Canadian Blue Lettuce
Lactuca graminifolia Michx. FAC Grass‐Leaf Lettuce
Lactuca ludoviciana (Nutt.) Riddell FAC Louisiana Lettuce
Lactuca serriola L. FACU Prickly Lettuce
Lactuca tatarica (L.) C.A. Mey. FAC Russian Blue Lettuce
Laennecia coulteri (Gray) Nesom FAC Coulter's Woolwort
Lamarckia aurea (L.) Moench FACU Golden‐Top Grass
Landoltia punctata (G.F.W. Mey.) D.H. Les & D.J. Crawford OBL Dotted Duckmeat
Lantana camara L. FACU Hedgeflower
Lantana urticoides Hayek FACU West Indian Shrub‐Verbena
Lapsana communis L. FAC Common Nipplewort
Larix occidentalis Nutt. FACU Western Larch
Lasthenia burkei (Greene) Greene OBL Burke's Goldfields
Lasthenia californica DC. ex Lindl. FACU California Goldfields
Lasthenia chrysantha (Greene ex Gray) Greene FAC Alkali‐Sink Goldfields
Lasthenia conjugens Greene FACW Contra Costa Goldfields
Lasthenia ferrisiae Ornduff OBL Ferris' Goldfields
Lasthenia fremontii (Torr. ex Gray) Greene OBL Fremont's Goldfields
Lasthenia glaberrima DC. OBL Smooth Goldfields
Lasthenia glabrata Lindl. FACW Yellow‐Ray Goldfields
Lasthenia minor (DC.) Ornduff FACW Coastal Goldfields
Lasthenia platycarpha (Gray) Greene FACW Alkali Goldfields
Lathyrus hirsutus L. FAC Singletary Vetchling
Lathyrus japonicus Willd. FACU Sea Vetchling
Lathyrus jepsonii Greene OBL Delta Vetchling
Lathyrus palustris L. OBL Marsh Vetchling
Lathyrus pusillus Ell. FAC Tiny Vetchling
Lathyrus sphaericus Retz. FACU Grass Vetchling
Lathyrus venosus Muhl. ex Willd. FAC Veiny Vetchling
Layia chrysanthemoides (DC.) Gray FACW Smooth Tidytips
Layia heterotricha (DC.) Hook. & Arn. FAC Pale‐Yellow Tidytips
Layia munzii Keck FACW Munz's Tidytips
Ledum glandulosum Nutt. FACW Glandular Labrador‐Tea
Ledum X columbianum Piper (pro sp.) OBL
Leersia hexandra Sw. OBL Southern Cut Grass
Leersia oryzoides (L.) Sw. OBL Rice Cut Grass
Leersia virginica Willd. FACW White Grass
Legenere limosa (Greene) McVaugh OBL False Venus'‐Looking‐Glass
Lemna aequinoctialis Welw. OBL Lesser Duckweed
Lemna gibba L. OBL Inflated Duckweed
Lemna minor L. OBL Common Duckweed
Lemna minuta Kunth OBL Least Duckweed
Lemna obscura (Austin) Daubs OBL Little Duckweed
Lemna trisulca L. OBL Ivy‐Leaf Duckweed
Lemna turionifera Landolt OBL Turion Duckweed
Lemna valdiviana Phil. OBL Pale Duckweed
Leonotis nepetifolia (L.) R. Br. ex Ait. f. FACU Christmas‐Candlestick
Leontodon autumnalis L. FAC August‐Flower
Leontodon saxatilis Lam. FACU Lesser Hawkbit
Lepidium davisii Rollins FACW Davis' Pepperwort
Lepidium dictyotum Gray FAC Alkali Pepperwort
Lepidium latifolium L. FAC Broad‐Leaf Pepperwort
Lepidium latipes Hook. FACW San Diego Pepperwort
Lepidium nitidum Nutt. FAC Shining Pepperwort
Lepidium oxycarpum Torr. & Gray OBL Forked Pepperwort
Lepidium perfoliatum L. FACU Clasping Pepperwort
Lepidium thurberi Woot. FACU Thurber's Pepperwort
Lepidium virginicum L. FACU Poorman's‐Pepperwort
Lepidospartum squamatum (Gray) Gray FACU California Scalebroom
Leptarrhena pyrolifolia (D. Don) R. Br. ex Ser. FACW Pearleaf
Leptochloa fusca (L.) Kunth FACW Bearded Sprangletop
Leptochloa nealleyi Vasey FACW Nealley's Sprangletop
Leptochloa panicea (Retz.) Ohwi FACW Needle Sprangletop
Leptochloa viscida (Scribn.) Beal FACU Sonoran Sprangletop
Leptosiphon nuttallii (Gray) J.M. Porter & L.A. Johnson FACU Nuttall's Perennial Gily‐Flower
Leucaena leucocephala (Lam.) de Wit FACU White Leadtree
Leucospora multifida (Michx.) Nutt. FACW Narrow‐Leaf Paleseed
Leucothoe davisiae Torr. ex Gray FACW Sierran Doghobble
Lewisia brachycalyx Engelm. ex Gray FACU Short‐Sepal Bitter‐Root
Lewisia cantelovii J.T. Howell OBL Cantelow's Bitter‐Root
Lewisia pygmaea (Gray) B.L. Robins. FACU Alpine Bitter‐Root
Leymus cinereus (Scribn. & Merr.) A. Löve FAC Great Basin Lyme Grass
Leymus condensatus (J. Presl) A. Löve FACU Giant Lyme Grass
Leymus mollis (Trin.) Pilger FACU American Lyme Grass
Leymus triticoides (Buckl.) Pilger FAC Beardless Lyme Grass
Liatris lancifolia (Greene) Kittell FAC Lance‐Leaf Gayfeather
Liatris ligulistylis (A. Nels.) K. Schum. FAC Strap‐Style Gayfeather
Ligusticum canbyi (Coult. & Rose) Coult. & Rose FAC Canby's Wild Lovage
Ligusticum grayi Coult. & Rose FAC Sheep Wild Lovage
Ligusticum porteri Coult. & Rose FACU Porter's Wild Lovage
Ligusticum tenuifolium S. Wats. FACW Slender‐Leaf Wild Lovage
Ligusticum verticillatum (Hook.) Coult. & Rose ex Rose FACW Idaho Wild Lovage
Ligustrum japonicum Thunb. FACU Japanese Privet
Lilaea scilloides (Poir.) Hauman OBL Flowering‐Quillwort
Lilaeopsis masonii Mathias & Constance OBL Mason's Grasswort
Lilaeopsis occidentalis Coult. & Rose OBL Western Grasswort
Lilaeopsis schaffneriana (Schlecht.) Coult. & Rose OBL Schaffner's Grasswort
Lilium bolanderi S. Wats. FACW Thimble Lily
Lilium kelleyanum J.G. Lemmon OBL Kelley's Lily
Lilium maritimum Kellogg FACW Coastal Lily
Lilium occidentale Purdy FACW Eureka Lily
Lilium pardalinum Kellogg FACW Leopard Lily
Lilium parryi S. Wats. OBL Lemon Lily
Lilium parvum Kellogg OBL Sierran Tiger Lily
Lilium philadelphicum L. FAC Wood Lily
Limnanthes alba Hartw. ex Benth. FACW White Meadowfoam
Limnanthes bakeri J.T. Howell OBL Baker's Meadowfoam
Limnanthes douglasii R. Br. OBL Douglas' Meadowfoam
Limnanthes floccosa T.J. Howell OBL Woolly Meadowfoam
Limnanthes gracilis T.J. Howell OBL Slender Meadowfoam
Limnanthes montana Jepson OBL Mountain Meadowfoam
Limnanthes striata Jepson FACW Foothill Meadowfoam
Limnanthes vinculans Ornduff OBL Cunningham Marsh Meadowfoam
Limnobium laevigatum (Humb. & Bonpl. ex Willd.) Heine OBL West Indian Spongeplant
Limnophila X ludoviciana Thieret OBL
Limonium arborescens (Brouss.) Kuntze FAC Tree Sea‐Lavender
Limonium californicum (Boiss.) Heller FACW Marsh‐Rosemary
Limonium limbatum Small FACW Trans‐Pecos Sea‐Lavender
Limonium ramosissimum (Poir.) Maire FACW Algerian Sea‐Lavender
Limonium sinuatum (L.) P. Mill. FACW Wavy‐Leaf Sea‐Lavender
Limosella acaulis Sessé & Moc. OBL Owyhee Mudwort
Limosella aquatica L. OBL Awl‐Leaf Mudwort
Limosella australis R. Br. OBL Welsh Mudwort
Limosella pubiflora Pennell OBL Chiricahua Mountain Mudwort
Lindernia dubia (L.) Pennell OBL Yellow‐Seed False Pimpernel
Linnaea borealis L. FACU American Twinflower
Liparis loeselii (L.) L.C. Rich. FACW Yellow Wide‐Lip Orchid
Lipocarpha aristulata (Coville) G. Tucker FACW Awned Halfchaff Sedge
Lipocarpha drummondii (Nees) G. Tucker FACW Drummond's Halfchaff Sedge
Lipocarpha micrantha (Vahl) G. Tucker OBL Small‐Flower Halfchaff Sedge
Lipocarpha occidentalis (Gray) G. Tucker FACW Western Halfchaff Sedge
Liquidambar styraciflua L. FAC Sweet‐Gum
Listera banksiana Lindl. FACU Northwestern Twayblade
Listera borealis Morong FACW Northern Twayblade
Listera convallarioides (Sw.) Nutt. ex Ell. FAC Broad‐Lip Twayblade
Listera cordata (L.) R. Br. ex Ait. f. FACW Heart‐Leaf Twayblade
Lloydia serotina (L.) Reichenb. FACU Common Alp‐Lily
Lobelia anatina F. Wimmer FACW Apache Lobelia
Lobelia berlandieri A. DC. FAC Berlandier's Lobelia
Lobelia cardinalis L. OBL Cardinal‐Flower
Lobelia dortmanna L. OBL Water Lobelia
Lobelia dunnii Greene FACW Dunn's Lobelia
Lobelia fenestralis Cav. FACU Fringe‐Leaf Lobelia
Lobelia kalmii L. OBL Brook Lobelia
Loiseleuria procumbens (L.) Desv. FACW Alpine‐Azalea
Lolium perenne L. FAC Perennial Rye Grass
Lomatium bicolor (S. Wats.) Coult. & Rose FACU Wasatch Desert‐Parsley
Lomatium caruifolium (Hook. & Arn.) Coult. & Rose FACW Alkali Desert‐Parsley
Lomatium cookii J.S. Kagan OBL Agate Desert‐Parsley
Lomatogonium rotatum (L.) Fries ex Fern. OBL Marsh‐Felwort
Lonicera caerulea L. FAC Sweet‐Berry Honeysuckle
Lonicera conjugialis Kellogg FAC Purple‐Flower Honeysuckle
Lonicera hispidula (Lindl.) Dougl. ex Torr. & Gray FACU Pink Honeysuckle
Lonicera involucrata (Richards.) Banks ex Spreng. FAC Four‐Line Honeysuckle
Lonicera japonica Thunb. FACU Japanese Honeysuckle
Lonicera utahensis S. Wats. FAC Rocky Mountain Honeysuckle
Lonicera X bella Zabel FACU
Lorandersonia linifolia (Greene) Urbatsch, R.P. Roberts & Neubig FAC Spear‐Leaf False Geesewood
Lotus alamosanus (Rose) Gentry OBL Sonoran Bird's‐Foot‐Trefoil
Lotus corniculatus L. FAC Garden Bird's‐Foot‐Trefoil
Lotus formosissimus Greene FACW Harlequin Bird's‐Foot‐Trefoil
Lotus glaber P. Mill. FACU Narrow‐Leaf Bird's‐Foot‐Trefoil
Lotus oblongifolius (Benth.) Greene OBL Streambank Bird's‐Foot‐Trefoil
Lotus pedunculatus Cav. FACU Large Bird's‐Foot‐Trefoil
Lotus pinnatus Hook. FACW Meadow Bird's‐Foot‐Trefoil
Ludwigia grandiflora (M. Micheli) Greuter & Burdet OBL Large‐Flower Primrose‐Willow
Ludwigia palustris (L.) Ell. OBL Marsh Primrose‐Willow
Ludwigia peploides (Kunth) Raven OBL Floating Primrose‐Willow
Ludwigia polycarpa Short & Peter OBL Many‐Fruit Primrose‐Willow
Ludwigia repens J.R. Forst. OBL Creeping Primrose‐Willow
Luetkea pectinata (Pursh) Kuntze FACU Partridgefoot
Lupinus arcticus S. Wats. FACU Arctic Lupine
Lupinus covillei Greene FACU Shaggy Lupine
Lupinus latifolius Lindl. ex J.G. Agardh FACW Broad‐Leaf Lupine
Lupinus padre‐crowleyi C.P. Sm. FACU Father Crowley's Lupine
Lupinus polyphyllus Lindl. FAC Blue‐Pod Lupine
Lupinus prunophilus M.E. Jones FACU Hairy Big‐Leaf Lupine
Lupinus rivularis Dougl. ex Lindl. FACU River‐Bank Lupine
Luzula comosa E. Mey. FAC Pacific Wood‐Rush
Luzula multiflora (Ehrh.) Lej. FACU Common Wood‐Rush
Luzula parviflora (Ehrh.) Desv. FAC Small‐Flower Wood‐Rush
Luzula spicata (L.) DC. FACU Spiked Wood‐Rush
Luzula subcapitata (Rydb.) Harrington OBL Colorado Wood‐Rush
Luzula subcongesta (S. Wats.) Jepson FACW Donner Wood‐Rush
Lycopodiella inundata (L.) Holub OBL Northern Bog Club‐Moss
Lycopodium clavatum L. FAC Running Ground‐Pine
Lycopodium lagopus (Laestad. ex Hartm.) Zinserl. ex Kuzen FACU One‐Cone Ground‐Pine
Lycopus americanus Muhl. ex W. Bart. OBL Cut‐Leaf Water‐Horehound
Lycopus asper Greene OBL Rough Water‐Horehound
Lycopus uniflorus Michx. OBL Northern Water‐Horehound
Lysichiton americanus Hultén & St. John OBL Yellow‐Skunk‐Cabbage
Lysiloma watsonii Rose FACU Little‐Leaf False Tamarind
Lysimachia arvensis (L.) U. Manns & A. Anderb. FAC Scarlet Yellow‐Loosestrife
Lysimachia ciliata L. FACW Fringed Yellow‐Loosestrife
Lysimachia hybrida Michx. OBL Lowland Yellow‐Loosestrife
Lysimachia minima (L.) U. Manns & A. Anderb. FACW Chaffweed
Lysimachia nummularia L. FACW Creeping‐Jenny
Lysimachia terrestris (L.) B.S.P. OBL Swampcandles
Lysimachia thyrsiflora L. OBL Tufted Yellow‐Loosestrife
Lysimachia vulgaris L. FACW Garden Yellow‐Loosestrife
Lythrum alatum Pursh OBL Wing‐Angle Loosestrife
Lythrum californicum Torr. & Gray OBL California Loosestrife
Lythrum hyssopifolium L. OBL Hyssop Loosestrife
Lythrum portula (L.) D.A. Webb OBL Spatula‐Leaf Loosestrife
Lythrum salicaria L. OBL Purple Loosestrife
Lythrum tribracteatum Salzm. ex Spreng. OBL Three‐Bract Loosestrife
Macroptilium atropurpureum (Moc. & Sessé ex DC.) Urban FACU Purple Bush‐Bean
Madia glomerata Hook. FACU Mountain Tarplant
Maianthemum dilatatum (Wood) A. Nels. & J.F. Macbr. FAC Two‐Leaf False Solomon's‐Seal
Maianthemum racemosum (L.) Link FAC Feathery False Solomon's‐Seal
Maianthemum stellatum (L.) Link FACU Starry False Solomon's‐Seal
Malacothamnus abbottii (Eastw.) Kearney FACW Monterey Bush‐Mallow
Malacothamnus davidsonii (B.L. Robins.) Greene FACU Sand Bush‐Mallow
Malaxis monophyllos (L.) Sw. FACW White Adder's‐Mouth Orchid
Malephora crocea (Jacq.) Schwant. FACU Coppery‐Mesemb
Malus fusca (Raf.) Schneid. FAC Oregon Crabapple
Malvastrum coromandelianum (L.) Garcke FAC Three‐Lobe False Mallow
Malvaviscus arboreus Dill. ex Cav. FACU Wax‐Mallow
Malvella leprosa (Ortega) Krapov. FACU Alkali‐Mallow
Marrubium vulgare L. FACU White Horehound
Marsilea mollis B.L. Robins. & Fern. OBL Chihuahuan Water‐Clover
Marsilea oligospora Goodding OBL Pacific Water‐Clover
Marsilea vestita Hook. & Grev. OBL Hairy Water‐Clover
Matricaria discoidea DC. FACU Pineapple‐Weed
Matricaria occidentalis Greene FACW Valley Mayweed
Mazus pumilus (Burm. f.) Steenis FACW Japanese Mazus
Mecardonia procumbens (P. Mill.) Small FACW Baby‐Jump‐Up
Meconella oregana Nutt. FAC White Fairy‐Poppy
Medicago lupulina L. FAC Black Medick
Medicago polymorpha L. FACU Toothed Medick
Medicago truncatula Gaertn. FACU Barrel Medick
Megathyrsus maximus (Jacq.) B.K. Simon & S.W.L. Jacobs FAC
Melampodium perfoliatum (Cav.) Kunth FAC Perfoliate Blackfoot
Melampyrum lineare Desr. FAC American Cow‐Wheat
Melica bulbosa Geyer ex Porter & Coult. FACU Onion Grass
Melica spectabilis Scribn. FAC Showy Melic Grass
Melilotus indicus (L.) All. FACU Indian Sweet‐Clover
Melilotus officinalis (L.) Lam. FACU Yellow Sweet‐Clover
Melochia pyramidata L. FAC Pyramid‐Flower
Melothria pendula L. FAC Guadeloupe‐Cucumber
Mentha aquatica L. FACW Water Mint
Mentha arvensis L. FACW American Wild Mint
Mentha pulegium L. OBL Pennyroyal
Mentha spicata L. OBL Spearmint
Mentha suaveolens Ehrh. FACW Apple Mint
Mentha X piperita L. (pro sp.) FACW
Mentha X villosa Huds. (pro sp.) FACW
Mentzelia leucophylla Brandeg. FAC Ash Meadows Blazingstar
Menyanthes trifoliata L. OBL Buck‐Bean
Menziesia ferruginea Sm. FACU Fool's‐Huckleberry
Merremia dissecta (Jacq.) Hallier f. FAC Noyau‐Vine
Mertensia bella Piper FACW Oregon Bluebells
Mertensia ciliata (James ex Torr.) G. Don FACW Tall Fringe Bluebells
Mertensia franciscana Heller OBL Franciscan Bluebells
Mertensia fusiformis Greene FACW Spindle‐Root Bluebells
Mertensia oblongifolia (Nutt.) G. Don FAC Languid‐Lady
Mertensia paniculata (Ait.) G. Don FACW Tall Bluebells
Mertensia viridis (A. Nels.) A. Nels. FACU Green Bluebells
Mesembryanthemum crystallinumL. FACU Crystalline Iceplant
Mesembryanthemum nodiflorum L. FAC Slender‐Leaf Iceplant
Microseris borealis (Bong.) Schultz‐Bip. OBL Northern Silverpuffs
Microseris douglasii (DC.) Schultz‐Bip. FACU Douglas' Silverpuffs
Microseris laciniata (Hook.) Schultz‐Bip. FACU Cut‐Leaf Silverpuffs
Microsteris gracilis (Hook.) Greene FACU Annual‐Phlox
Mimetanthe pilosa (Benth.) Greene FACW False Monkey‐Flower
Mimulus alsinoides Dougl. ex Benth. OBL Wing‐Stem Monkey‐Flower
Mimulus angustatus (Gray) Gray OBL Purple‐Lip Pansy Monkey‐Flower
Mimulus bicolor Hartw. ex Benth. FACU Yellow‐and‐White Monkey‐Flower
Mimulus biolettii Eastw. FAC Hetch Hetchy Monkey‐Flower
Mimulus breviflorus Piper FACW Short‐Flower Monkey‐Flower
Mimulus breweri (Greene) Coville FACU Brewer's Monkey‐Flower
Mimulus cardinalis Dougl. ex Benth. FACW Scarlet Monkey‐Flower
Mimulus congdonii B.L. Robins. FAC Congdon's Monkey‐Flower
Mimulus dentatus Nutt. ex Benth. OBL Coastal Monkey‐Flower
Mimulus dentilobus B.L. Robins. & Fern. OBL Tooth‐Petal Monkey‐Flower
Mimulus douglasii (Benth.) Gray FACW Brownies
Mimulus eastwoodiae Rydb. OBL Eastwood's Monkey‐Flower
Mimulus exiguus Gray FACU San Bernardino Mountain Monkey‐Flow
Mimulus filicaulis S. Wats. FACW Slender‐Stem Monkey‐Flower
Mimulus floribundus Lindl. OBL Purple‐Stem Monkey‐Flower
Mimulus glabratus Kunth OBL Round‐Leaf Monkey‐Flower
Mimulus glaucescens Greene OBL Shield‐Bract Monkey‐Flower
Mimulus guttatus DC. OBL Seep Monkey‐Flower
Mimulus inconspicuus Gray FACU Small‐Flower Monkey‐Flower
Mimulus laciniatus Gray FAC Cut‐Leaf Monkey‐Flower
Mimulus latidens (Gray) Greene OBL Broad‐Tooth Monkey‐Flower
Mimulus lewisii Pursh FACW Great Purple Monkey‐Flower
Mimulus moschatus Dougl. ex Lindl. FACW Muskflower
Mimulus nanus Hook. & Arn. FACU Dwarf Purple Monkey‐Flower
Mimulus nudatus Curran ex Greene OBL Bare Monkey‐Flower
Mimulus parishii Greene FACU Parish's Monkey‐Flower
Mimulus primuloides Benth. FACW Yellow Creeping Monkey‐Flower
Mimulus pulchellus (E. Drew ex Greene) A.L. Grant FACW Yellow‐Lip Pansy Monkey‐Flower
Mimulus purpureus A.L. Grant FACU Little Purple Monkey‐Flower
Mimulus pygmaeus A.L. Grant OBL Egg Lake Monkey‐Flower
Mimulus ringens L. OBL Allegheny Monkey‐Flower
Mimulus rubellus Gray FAC Little Red‐Stem Monkey‐Flower
Mimulus suksdorfii Gray FACU Miniature Monkey‐Flower
Mimulus tilingii Regel OBL Subalpine Monkey‐Flower
Mimulus tricolor Hartw. ex Lindl. OBL Tricolor Monkey‐Flower
Mimulus washingtonensis Gandog. OBL Washington Monkey‐Flower
Minuartia californica (Gray) Mattf. FACU California Stitchwort
Minuartia obtusiloba (Rydb.) House FACU Alpine Stitchwort
Minuartia rubella (Wahlenb.) Hiern. FACU Boreal Stitchwort
Minuartia stricta (Sw.) Hiern. FAC Bog Stitchwort
Mirabilis nyctaginea (Michx.) MacM. FACU Heart‐Leaf Four‐O'clock
Miscanthus sinensis Anderss. FACW Chinese Silver Grass
Mitella breweri Gray FAC Feathery Bishop's‐Cap
Mitella caulescens Nutt. FAC Star Bishop's‐Cap
Mitella diversifolia Greene FAC Angle‐Leaf Bishop's‐Cap
Mitella nuda L. FACW Bare‐Stem Bishop's‐Cap
Mitella ovalis Greene OBL Coastal Bishop's‐Cap
Mitella pentandra Hook. FACW Five‐Stamen Bishop's‐Cap
Mitella stauropetala Piper FAC Side‐Flower Bishop's‐Cap
Mitella trifida Graham FAC Pacific Bishop's‐Cap
Mitracarpus hirtus (L.) DC. FACU Tropical Girdlepod
Modiola caroliniana (L.) G. Don FAC Carolina Bristle‐Mallow
Moehringia lateriflora (L.) Fenzl FACU Blunt‐Leaf Grove‐Sandwort
Mollugo cerviana (L.) Ser. FAC Thread‐Stem Carpetweed
Mollugo verticillata L. FACU Green Carpetweed
Monanthochloe littoralis Engelm. OBL Shore Grass
Monarda fistulosa L. FACU Oswego‐Tea
Monardella australis Abrams FACU Southern Mountainbalm
Monardella linoides Gray FACU Flax‐Leaf Mountainbalm
Monardella odoratissima Benth. FACU Alpine Mountainbalm
Monardella viminea Greene FACU Willowy Mountainbalm
Moneses uniflora (L.) Gray FACU Single‐Delight
Monochoria vaginalis (Burm. f.) K. Presl ex Kunth OBL Heart‐Shape False Pickerelweed
Monolepis nuttalliana (J.A. Schultes) Greene FAC Nuttall's Poverty‐Weed
Monolopia congdonii (Gray) B.G. Baldwin FACU San Joaquin Woollythread
Monotropa uniflora L. FACU One‐Flower Indian‐Pipe
Montia chamissoi (Ledeb. ex Spreng.) Greene OBL Chamisso's Candy‐Flower
Montia dichotoma (Nutt.) T.J. Howell FAC Dwarf Candy‐Flower
Montia fontana L. OBL Fountain Candy‐Flower
Montia howellii S. Wats. FACW Howell's Candy‐Flower
Montia linearis (Dougl. ex Hook.) Greene FAC Linear‐Leaf Candy‐Flower
Montia parvifolia (Moc. ex DC.) Greene FACW Little‐Leaf Candy‐Flower
Morella californica (Cham.) Wilbur FACW Pacific Bayberry
Morus alba L. FACU White Mulberry
Morus microphylla Buckl. FACU Texas Mulberry
Muhlenbergia andina (Nutt.) A.S. Hitchc. FAC Fox‐Tail Muhly
Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi FACW Alkali Muhly
Muhlenbergia californica Vasey FACW California Muhly
Muhlenbergia filiformis (Thurb. ex S. Wats.) Rydb. FACW Pullup Muhly
Muhlenbergia frondosa (Poir.) Fern. FACW Wire‐Stem Muhly
Muhlenbergia glomerata (Willd.) Trin. FACW Spiked Muhly
Muhlenbergia mexicana (L.) Trin. FAC Mexican Muhly
Muhlenbergia minutissima (Steud.) Swallen FAC Least Muhly
Muhlenbergia pectinata C.O. Goodding OBL Comb‐Top Muhly
Muhlenbergia racemosa (Michx.) B.S.P. FACW Green Muhly
Muhlenbergia ramulosa (Kunth) Swallen FACU Ponderosa Muhly
Muhlenbergia richardsonis (Trin.) Rydb. FAC Matted Muhly
Muhlenbergia rigens (Benth.) A.S. Hitchc. FAC Deer Grass
Muhlenbergia schreberi J.F. Gmel. FACU Nimblewill
Muhlenbergia sylvatica (Torr.) Torr. ex Gray FACW Woodland Muhly
Muhlenbergia utilis (Torr.) A.S. Hitchc. FACW Aparejo Grass
Muhlenbergia wrightii Vasey ex Coult. FACU Wright's Muhly
Myoporum laetum G. Forst. FACU Ngaio‐Tree
Myosotis arvensis (L.) Hill FAC Rough Forget‐Me‐Not
Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja FAC Asian Forget‐Me‐Not
Myosotis discolor Pers. FACW Yellow Scorpion‐Grass
Myosotis laxa Lehm. OBL Bay Forget‐Me‐Not
Myosotis scorpioides L. FACW True Forget‐Me‐Not
Myosotis sylvatica Ehrh. ex Hoffmann FAC Woodland Forget‐Me‐Not
Myosotis verna Nutt. FAC Spring Forget‐Me‐Not
Myosurus apetalus C. Gay OBL Bristly Mousetail
Myosurus cupulatus S. Wats. FAC Arizona Mousetail
Myosurus minimus L. OBL Tiny Mousetail
Myosurus sessilis S. Wats. FACW Vernal‐Pool Mousetail
Myrica hartwegii S. Wats. FAC Sierran‐Bayberry
Myriophyllum aquaticum (Vell.) Verdc. OBL Parrot's‐Feather
Myriophyllum hippuroides Nutt. ex Torr. & Gray OBL Western Water‐Milfoil
Myriophyllum quitense Kunth OBL Andean Water‐Milfoil
Myriophyllum sibiricum Komarov OBL Siberian Water‐Milfoil
Myriophyllum spicatum L. OBL Eurasian Water‐Milfoil
Myriophyllum verticillatum L. OBL Whorled Water‐Milfoil
Najas flexilis (Willd.) Rostk. & Schmidt OBL Wavy Waternymph
Najas gracillima (A. Braun ex Engelm.) Magnus OBL Slender Waternymph
Najas graminea Delile OBL Ricefield Waternymph
Najas guadalupensis (Spreng.) Magnus OBL Guadalupe Waternymph
Najas marina L. OBL Holly‐Leaf Waternymph
Nama stenocarpum Gray FACW Mud Fiddleleaf
Nama torynophyllum Greenm. FACW Matted Fiddleleaf
Narthecium californicum Baker OBL California Bog Asphodel
Nasturtium gambelii (S. Wats.) O.E. Schulz OBL Gambel's Watercress
Nasturtium microphyllum Boenn. ex Reichenb. OBL One‐Row Watercress
Nasturtium officinale Ait. f. OBL Watercress
Navarretia breweri (Gray) Greene FAC Yellow Pincushion‐Plant
Navarretia capillaris (Kellogg) Kuntze FAC Miniature Pincushion‐Plant
Navarretia cotulifolia (Benth.) Hook. & Arn. OBL Cotula‐Leaf Pincushion‐Plant
Navarretia eriocephala Mason FAC Hoary Pincushion‐Plant
Navarretia fossalis Moran OBL Vernal‐Pool Pincushion‐Plant
Navarretia heterandra Mason OBL Tehama Pincushion‐Plant
Navarretia intertexta (Benth.) Hook. FACW Needle‐Leaf Pincushion‐Plant
Navarretia jepsonii V. Bailey ex Jepson FACW Jepson's Pincushion‐Plant
Navarretia leucocephala Benth. OBL White‐Flower Pincushion‐Plant
Navarretia mellita Greene FAC Honey‐Scented Pincushion‐Plant
Navarretia myersii Allen & Day OBL Myers' Pincushion‐Plant
Navarretia nigelliformis Greene FACW Adobe Pincushion‐Plant
Navarretia peninsularis Greene FAC Baja Pincushion‐Plant
Navarretia prostrata (Gray) Greene OBL Prostrate Pincushion‐Plant
Navarretia saximontana S.C. Spencer FACW Rocky Mountain Pincushion‐Plant
Navarretia squarrosa (Eschsch.) Hook. & Arn. FACU Skunkweed
Navarretia subuligera Greene FACU Awl‐Leaf Pincushion‐Plant
Navarretia tagetina Greene FACW Marigold Pincushion‐Plant
Neeragrostis reptans (Michx.) Nicora OBL Creeping Love Grass
Nelumbo lutea Willd. OBL American Lotus
Nemophila pedunculata Dougl. ex Benth. FAC Meadow Baby‐Blue‐Eyes
Neostapfia colusana (Burtt‐Davy) Burtt‐Davy OBL Colusa Grass
Nepeta cataria L. FACU Catnip
Nephrolepis exaltata (L.) Schott FACU Boston Sword Fern
Nicotiana attenuata Torr. ex S. Wats. FACU Coyote Tobacco
Nicotiana glauca Graham FAC Tree Tobacco
Nicotiana obtusifolia Mertens & Galeotti FACU Desert Tobacco
Nicotiana quadrivalvis Pursh FACU Indian Tobacco
Nicotiana repanda Willd. ex Lehm. FAC Fiddle‐Leaf Tobacco
Nitrophila mohavensis Munz & Roos FACW Amargosa Niterwort
Nitrophila occidentalis (Moq.) S. Wats. FACW Boraxweed
Nothoscordum bivalve (L.) Britt. FACU Crowpoison
Nuphar lutea (L.) Sm. OBL Yellow Pond‐Lily
Nymphaea alba L. OBL European White Water‐Lily
Nymphaea mexicana Zucc. OBL Banana Water‐Lily
Nymphaea odorata Ait. OBL American White Water‐Lily
Nymphaea X thiona Ward OBL
Nymphoides peltata (Gmel.) Kuntze OBL Yellow Floatingheart
Oemleria cerasiformis (Torr. & Gray ex Hook. & Arn.) Landon FACU Oso‐Berry
Oenanthe sarmentosa K. Presl ex DC. OBL Pacific Water‐Dropwort
Oenothera biennis L. FACU King's‐Cureall
Oenothera curtiflora W.L. Wagner & Hoch FACU Velvetweed
Oenothera elata Kunth FACW Hooker's Evening‐Primrose
Oenothera flava (A. Nels.) Garrett FAC Long‐Tube Evening‐Primrose
Oenothera jamesii Torr. & Gray FACW Trumpet Evening‐Primrose
Oenothera kunthiana (Spach) Munz FACU Kunth's Evening‐Primrose
Oenothera laciniata Hill FAC Cut‐Leaf Evening‐Primrose
Oenothera longissima Rydb. OBL Long‐Stem Evening‐Primrose
Oenothera organensis Munz OBL Organ Mountain Evening‐Primrose
Oenothera rhombipetala Nutt. ex Torr. & Gray FACU Greater Four‐Point Evening‐Primrose
Oenothera rosea L'Hér. ex Ait. FACW Rose Evening‐Primrose
Oenothera tetraptera Cav. FAC Four‐Wing Evening‐Primrose
Oenothera texensis Raven & Parnell FACW Texas Evening‐Primrose
Oenothera villosa Thunb. FAC Hairy Evening‐Primrose
Oligoneuron rigidum (L.) Small FACU Hard‐Leaf Flat‐Top‐Goldenrod
Olsynium douglasii (A. Dietr.) Bickn. FACU Grasswidow
Oncosiphon piluliferum (L. f.) Källersjö FACU Stinknet
Ophioglossum californicum Prantl FAC California Adder's‐Tongue
Ophioglossum engelmannii Prantl FACW Limestone Adder's‐Tongue
Ophioglossum pusillum Raf. FACW Northern Adder's‐Tongue
Ophioglossum vulgatum L. FAC Southern Adder's‐Tongue
Oplopanax horridus (Small) Miq. FAC Devil's‐Club
Orcuttia californica Vasey OBL California Orcutt Grass
Orcuttia inaequalis Hoover OBL San Joaquin Valley Orcutt Grass
Orcuttia pilosa Hoover OBL Hairy Orcutt Grass
Orcuttia tenuis A.S. Hitchc. OBL Slender Orcutt Grass
Orcuttia viscida (Hoover) J. Reeder OBL Sacramento Orcutt Grass
Oreostemma alpigenum (Torr. & Gray) Greene FAC Tundra Mountaincrown
Oreostemma elatum (Greene) Greene FACW Plumas Mountaincrown
Ornithogalum umbellatum L. FACU Sleepydick
Orobanche riparia Collins FACW River Broom‐Rape
Orobanche uniflora L. FACU Naked Broom‐Rape
Orogenia fusiformis S. Wats. FACW California Indian‐Potato
Orthilia secunda (L.) House FACU Sidebells
Orthocarpus bracteosus Benth. FAC Rosy Owl‐Clover
Orthocarpus luteus Nutt. FACU Golden‐Tongue Owl‐Clover
Oryza sativa L. OBL Cultivated Rice
Osmorhiza berteroi DC. FACU Mountain Sweet‐Cicely
Osmorhiza longistylis (Torr.) DC. FACU Aniseroot
Osmorhiza purpurea (Coult. & Rose) Suksdorf FAC Purple Sweet‐Cicely
Ostrya knowltonii Sarg. FAC Knowlton's Hop‐Hornbeam
Ottelia alismoides (L.) Pers. OBL Duck‐Lettuce
Oxalis corniculata L. FACU Creeping Yellow Wood‐Sorrel
Oxalis dillenii Jacq. FACU Slender Yellow Wood‐Sorrel
Oxalis oregana Nutt. FACU Redwood‐Sorrel
Oxalis stricta L. FACU Upright Yellow Wood‐Sorrel
Oxalis trilliifolia Hook. FAC Trillium‐Leaf Wood‐Sorrel
Oxypolis fendleri (Gray) Heller FACW Fendler's Cowbane
Oxypolis occidentalis Coult. & Rose OBL Western Cowbane
Oxyria digyna (L.) Hill FACU Mountain‐Sorrel
Oxytenia acerosa Nutt. FACU Copperweed
Oxytropis deflexa (Pallas) DC. FACU Pendant‐Pod Locoweed
Oxytropis oreophila Gray FACU Mountain Locoweed
Oxytropis parryi Gray FACU Parry's Locoweed
Oxytropis splendens Dougl. ex Hook. FAC Whorled Locoweed
Packera bernardina (Greene) W.A. Weber & A. Löve FACU San Bernardino Groundsel
Packera bolanderi (Gray) W.A. Weber & A. Löve FAC Bolander's Groundsel
Packera clevelandii (Greene) W.A. Weber & A. Löve FACW Cleveland's Groundsel
Packera crocata (Rydb.) W.A. Weber & A. Löve FAC Saffron Groundsel
Packera cymbalaria (Pursh) W.A. Weber & A. Löve FACU Dwarf Arctic Groundsel
Packera debilis (Nutt.) W.A. Weber & A. Löve FACW Weak‐Stem Groundsel
Packera dimorphophylla (Greene) W.A. Weber & A. Löve FACU Two‐Leaf Groundsel
Packera hartiana (Heller) W.A. Weber & A. Löve FACW Hart's Groundsel
Packera indecora (Greene) A.& D. Löve FACW Rayless Mountain Groundsel
Packera macounii (Greene) W.A. Weber & A. Löve FACU Siskiyou Mountain Groundsel
Packera obovata (Muhl. ex Willd.) W.A. Weber & A. Löve FACU Round‐Leaf Groundsel
Packera pauciflora (Pursh) A.& D. Löve FAC Rayless Alpine Groundsel
Packera paupercula (Michx.) A.& D. Löve FACW Balsam Groundsel
Packera pseudaurea (Rydb.) W.A. Weber & A. Löve FACW Streambank Groundsel
Packera streptanthifolia (Greene) W.A. Weber & A. Löve FACU Rocky Mountain Groundsel
Packera subnuda (DC.) D.K. Trock & T.M. Barkl. FACW Buek's Groundsel
Packera tampicana (DC.) C. Jeffrey FACW Great Plains Groundsel
Pancratium maritimum L. FACU Sea‐Daffodil
Panicum amarum Ell. FACU Bitter Panic Grass
Panicum capillare L. FACU Common Panic Grass
Panicum coloratum L. FACW Blue Panic Grass
Panicum dichotomiflorum Michx. FACW Fall Panic Grass
Panicum flexile (Gattinger) Scribn. FAC Wiry Panic Grass
Panicum hillmanii Chase FACU Hillman's Panic Grass
Panicum repens L. FAC Torpedo Grass
Panicum rigidulum Bosc ex Nees FACW Red‐Top Panic Grass
Panicum virgatum L. FACW Wand Panic Grass
Parapholis incurva (L.) C.E. Hubbard FAC Curved Sickle Grass
Parapholis strigosa (Dumort.) C.E. Hubbard OBL European Sickle Grass
Parathelypteris nevadensis (Baker) Holttum FAC
Parentucellia viscosa (L.) Caruel FAC Yellow Glandweed
Parietaria hespera Hinton FACU Rillita Pellitory
Parietaria pensylvanica Muhl. ex Willd. FACU Pennsylvania Pellitory
Parkinsonia aculeata L. FAC Mexican Palo‐Verde
Parnassia californica (Gray) Greene OBL California Grass‐of‐Parnassus
Parnassia cirrata Piper OBL San Bernardino Grass‐of‐Parnassus
Parnassia fimbriata Koenig OBL Fringed Grass‐of‐Parnassus
Parnassia kotzebuei Cham. ex Spreng. OBL Kotzebue's Grass‐of‐Parnassus
Parnassia palustris L. OBL Marsh Grass‐of‐Parnassus
Paronychia ahartii Ertter FAC Ahart's Nailwort
Parthenium hysterophorus L. FAC Santa Maria Feverfew
Parthenocissus quinquefolia (L.) Planch. FAC Virginia‐Creeper
Parthenocissus vitacea (Knerr) A.S. Hitchc. FACU Thicket‐Creeper
Pascopyrum smithii (Rydb.) A. Löve FAC Western‐Wheat Grass
Paspalum dilatatum Poir. FAC Golden Crown Grass
Paspalum distichum L. FACW Jointed Crown Grass
Paspalum notatum Flueggé FAC Bahia Grass
Paspalum plicatulum Michx. FAC Brown‐Seed Crown Grass
Paspalum pubiflorum Rupr. ex Fourn. FACW Hairy‐Seed Crown Grass
Paspalum urvillei Steud. FAC Vasey's Grass
Paspalum vaginatum Sw. FACW Seashore Crown Grass
Paspalum virgatum L. FACW Talquezal
Passiflora foetida L. FAC Scarlet‐Fruit Passion‐Flower
Pedicularis attollens Gray OBL Little Elephant's‐Head
Pedicularis canadensis L. FAC Canadian Lousewort
Pedicularis contorta Benth. FACU White Coil‐Beak Lousewort
Pedicularis crenulata Benth. FACW Purple‐Flower Lousewort
Pedicularis groenlandica Retz. OBL Bull Elephant's‐Head
Pedicularis parryi Gray FACU Parry's Lousewort
Pedicularis procera Gray FACU Giant Lousewort
Pedicularis sudetica Willd. FACW Sudetic Lousewort
Pellaea ternifolia (Cav.) Link FACU Trans‐Pecos Cliffbrake
Peltandra virginica (L.) Schott OBL Green Arrow‐Arum
Pennisetum clandestinum Hochst. ex Chiov. FACU Kikuyu Grass
Pennisetum polystachion (L.) J.A. Schultes FAC Mission Grass
Pennisetum purpureum Schumacher FACU Elephant Grass
Penstemon attenuatus Dougl. ex Lindl. FACU Sulphur Beardtongue
Penstemon baccharifolius Hook. FACU Baccharis‐Leaf Beardtongue
Penstemon globosus (Piper) Pennell & Keck FAC Globe Beardtongue
Penstemon heterodoxus Gray FACU Sierran Beardtongue
Penstemon lyallii (Gray) Gray FACU Lyall's Beardtongue
Penstemon procerus Dougl. ex Graham FAC Pincushion Beardtongue
Penstemon pseudoputus (Crosswhite) N. Holmgren FACU Kaibab Plateau Beardtongue
Penstemon rydbergii A. Nels. FACU Meadow Beardtongue
Penstemon serrulatus Menzies ex Sm. FACU Cascade Beardtongue
Penstemon virgatus Gray FACU Upright Blue Beardtongue
Penstemon whippleanus Gray FACU Dark Beardtongue
Pentachaeta fragilis Brandeg. FAC Fragile Pygmy Daisy
Perideridia californica (Torr.) A. Nels. & J.F. Macbr. FACW California Yampah
Perideridia gairdneri (Hook. & Arn.) Mathias FAC Common Yampah
Perideridia howellii (Coult. & Rose) Mathias FACW Howell's Yampah
Perideridia parishii (Coult. & Rose) A. Nels. & J.F. Macbr. FAC Parish's Yampah
Persicaria amphibia (L.) S.F. Gray p.p. OBL Water Smartweed
Persicaria bicornis (Raf.) Nieuwl. FACW Pink Knotweed
Persicaria capitata (Buch.‐Ham. ex D. Don) Gross. FACU Pink‐Head Smartweed
Persicaria glabra (Willd.) M. Gómez OBL Smooth Smartweed
Persicaria hydropiper (L.) Delarbre OBL Mild Water‐Pepper
Persicaria hydropiperoides (Michx.) Small OBL Swamp Smartweed
Persicaria lapathifolia (L.) S.F. Gray FACW Dock‐Leaf Smartweed
Persicaria maculosa S.F. Gray FACW Lady's‐Thumb
Persicaria orientalis (L.) Spach FACW Kiss‐Me‐Over‐the‐Garden‐Gate
Persicaria pensylvanica (L.) M. Gómez FACW Pinkweed
Persicaria punctata (Ell.) Small OBL Dotted Smartweed
Persicaria sagittata (L.) Gross. OBL Arrow‐Leaf Tearthumb
Persicaria setacea (Baldw.) Small OBL Bog Smartweed
Persicaria wallichii Greuter & Burdet FAC Garden Smartweed
Petasites frigidus (L.) Fries FACW Arctic Sweet‐Colt's‐Foot
Phacelia amabilis Constance FACU Saline Valley Scorpion‐Weed
Phacelia distans Benth. OBL Distant Scorpion‐Weed
Phacelia heterophylla Pursh FACU Variable‐Leaf Scorpion‐Weed
Phacelia inundata J.T. Howell FACW Playa Yellow Scorpion‐Weed
Phacelia inyoensis (J.F. Macbr.) J.T. Howell FAC Inyo Yellow Scorpion‐Weed
Phacelia lemmonii Gray FACU Lemmon's Scorpion‐Weed
Phacelia orogenes Brand FACU Mountain Scorpion‐Weed
Phacelia parishii Gray FACU Parish's Scorpion‐Weed
Phacelia procera Gray FAC Tall Scorpion‐Weed
Phacelia ramosissima Dougl. ex Lehm. FACU Branched Scorpion‐Weed
Phacelia tetramera J.T. Howell FAC Four‐Part Yellow Scorpion‐Weed
Phalacroseris bolanderi Gray OBL Bolander's Mock Dandelion
Phalaris angusta Nees ex Trin. FACW Timothy Canary Grass
Phalaris aquatica L. FACU Harding Grass
Phalaris arundinacea L. FACW Reed Canary Grass
Phalaris brachystachys Link FACW Short‐Spike Canary Grass
Phalaris californica Hook. & Arn. FAC California Canary Grass
Phalaris canariensis L. FACU Common Canary Grass
Phalaris caroliniana Walt. FACW May Grass
Phalaris lemmonii Vasey FACW Lemmon's Canary Grass
Phalaris paradoxa L. FAC Mediterranean Canary Grass
Phegopteris connectilis (Michx.) Watt FACU Narrow Beech Fern
Phippsia algida (Soland.) R. Br. OBL Ice Grass
Phleum alpinum L. FAC Mountain Timothy
Phleum pratense L. FACU Common Timothy
Phlox idahonis Wherry FACW Clearwater Phlox
Phlox kelseyi Britt. FACW Marsh Phlox
Phlox paniculata L. FACU Fall Phlox
Phlox pilosa L. FAC Downy Phlox
Phragmites australis (Cav.) Trin. ex Steud. FACW Common Reed
Phryma leptostachya L. FACU American Lopseed
Phyla cuneifolia (Torr.) Greene FAC Wedgeleaf
Phyla fruticosa (P. Mill.) Kennedy FAC Diamond‐Leaf Frogfruit
Phyla lanceolata (Michx.) Greene OBL Northern Frogfruit
Phyla nodiflora (L.) Greene FACW Turkey‐Tangle
Phyllanthus caroliniensis Walt. FAC Carolina Leaf‐Flower
Phyllodoce breweri (Gray) Heller FAC Red Mountain‐Heath
Phyllodoce empetriformis (Sm.) D. Don FACU Pink Mountain‐Heath
Phyllodoce glanduliflora (Hook.) Coville FACU Yellow Mountain‐Heath
Phyllospadix scouleri Hook. OBL Scouler's Surf‐Grass
Phyllospadix torreyi S. Wats. OBL Torrey's Surf‐Grass
Physalis pubescens L. FACU Husk‐Tomato
Physaria gracilis (Hook.) O'Kane & Al‐Shehbaz FACW Spreading Bladderpod
Physocarpus capitatus (Pursh) Kuntze FACW Pacific Ninebark
Physocarpus opulifolius (L.) Maxim. FACU Atlantic Ninebark
Physostegia parviflora Nutt. ex Gray FACW Western False Dragonhead
Physostegia virginiana (L.) Benth. FACW Obedient‐Plant
Phytolacca americana L. FAC American Pokeweed
Picea engelmannii Parry ex Engelm. FACU Engelmann's Spruce
Picea glauca (Moench) Voss FAC White Spruce
Picea pungens Engelm. FAC Blue Spruce
Picea sitchensis (Bong.) Carr. FAC Sitka Spruce
Pilularia americana A. Braun OBL American Pillwort
Pinguicula macroceras Link OBL California Butterwort
Pinus contorta Dougl. ex Loud. FAC Lodgepole Pine
Pinus monticola Dougl. ex D. Don FACU Western White Pine
Pinus ponderosa P.& C. Lawson FACU Ponderosa Pine
Piperia unalascensis (Spreng.) Rydb. FACU Alaska Rein Orchid
Pistia stratiotes L. OBL Water‐Lettuce
Plagiobothrys acanthocarpus (Piper) I.M. Johnston OBL Adobe Popcorn‐Flower
Plagiobothrys austiniae (Greene) I.M. Johnston OBL Austin's Popcorn‐Flower
Plagiobothrys bracteatus (T.J. Howell) I.M. Johnston FACW Bracted Popcorn‐Flower
Plagiobothrys chorisianus (Cham.) I.M. Johnston OBL Artist's Popcorn‐Flower
Plagiobothrys distantiflorus (Piper) I.M. Johnston ex M.E. Peck OBL California Popcorn‐Flower
Plagiobothrys figuratus (Piper) I.M. Johnston ex M.E. Peck FACW Fragrant Popcorn‐Flower
Plagiobothrys glaber (Gray) I.M. Johnston OBL Hairless Popcorn‐Flower
Plagiobothrys glyptocarpus (Piper) I.M. Johnston FACW Sculptured Popcorn‐Flower
Plagiobothrys greenei (Gray) I.M. Johnston FACW Greene's Popcorn‐Flower
Plagiobothrys humistratus (Greene) I.M. Johnston OBL Dwarf Popcorn‐Flower
Plagiobothrys hystriculus (Piper) I.M. Johnston FACW Bearded Popcorn‐Flower
Plagiobothrys leptocladus (Greene) I.M. Johnston OBL Alkali Popcorn‐Flower
Plagiobothrys lithocaryus (Greene ex Gray) I.M. Johnston FACW Mayacamas Popcorn‐Flower
Plagiobothrys mollis (Gray) I.M. Johnston FACW Soft Popcorn‐Flower
Plagiobothrys nothofulvus (Gray) Gray FAC Rusty Popcorn‐Flower
Plagiobothrys parishii I.M. Johnston OBL Parish's Popcorn‐Flower
Plagiobothrys reticulatus (Piper) I.M. Johnston FACW Netted Popcorn‐Flower
Plagiobothrys salsus (Brandeg.) I.M. Johnston FACW Salty Popcorn‐Flower
Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnston FACW Meadow Popcorn‐Flower
Plagiobothrys stipitatus (Greene) I.M. Johnston FACW Stalked Popcorn‐Flower
Plagiobothrys strictus (Greene) I.M. Johnston OBL Calistoga Popcorn‐Flower
Plagiobothrys tenellus (Nutt. ex Hook.) Gray FACU Pacific Popcorn‐Flower
Plagiobothrys tener (Greene) I.M. Johnston OBL Slender Popcorn‐Flower
Plagiobothrys trachycarpus (Gray) I.M. Johnston FACW Rough‐Fruit Popcorn‐Flower
Plantago australis Lam. FACW Mexican Plantain
Plantago bigelovii Gray OBL Annual Coastal Plantain
Plantago coronopus L. FACW Buck‐Horn Plantain
Plantago elongata Pursh FACW Prairie Plantain
Plantago eriopoda Torr. FACW Red‐Woolly Plantain
Plantago firma Kunze ex Walp. FACW Chilean Plantain
Plantago heterophylla Nutt. FAC Slender Plantain
Plantago lanceolata L. FAC English Plantain
Plantago major L. FAC Great Plantain
Plantago maritima L. FACW Goosetongue
Plantago ovata Forssk. FACU Blond Plantain
Plantago rhodosperma Dcne. FAC Red‐Seed Plantain
Plantago rugelii Dcne. FAC Black‐Seed Plantain
Plantago subnuda Pilger FACW Tall Coastal Plantain
Plantago virginica L. FACU Pale‐Seed Plantain
Platanthera dilatata (Pursh) Lindl. ex Beck FACW Scentbottle
Platanthera huronensis (Nutt.) Lindl. OBL Lake Huron Green Orchid
Platanthera limosa Lindl. OBL Thurber's Bog Orchid
Platanthera obtusata (Banks ex Pursh) Lindl. FACW Blunt‐Leaf Orchid
Platanthera orbiculata (Pursh) Lindl. FAC Lesser Round‐Leaf Orchid
Platanthera purpurascens (Rydb.) Sheviak & Jennings OBL Purple‐Petal Bog Orchid
Platanthera sparsiflora (S. Wats.) Schlechter FACW Canyon Bog Orchid
Platanthera stricta Lindl. FACW Slender Bog Orchid
Platanthera X lassenii Schrenk FACW
Platanus occidentalis L. FAC American Sycamore
Platanus racemosa Nutt. FAC California Sycamore
Platanus wrightii S. Wats. FACW Arizona Sycamore
Plectritis ciliosa (Greene) Jepson FACU Long‐Spur Seablush
Plectritis congesta (Lindl.) DC. FACU Short‐Spur Seablush
Plectritis macrocera Torr. & Gray FACU White Seablush
Pleuropogon californicus (Nees) Benth. ex Vasey OBL California False Semaphore Grass
Pleuropogon hooverianus (L. Benson) J.T. Howell FACW North Coast False Semaphore Grass
Pleuropogon oregonus Chase OBL Oregon False Semaphore Grass
Pleuropogon refractus (Gray) Benth. ex Vasey OBL Nodding False Semaphore Grass
Pluchea odorata (L.) Cass. FACW Sweetscent
Pluchea sericea (Nutt.) Coville FACW Arrow‐Weed
Plumbago zeylanica L. FAC Wild Leadwort
Poa abbreviata R. Br. FACU Northern Blue Grass
Poa alpina L. FAC Alpine Blue Grass
Poa annua L. FACU Annual Blue Grass
Poa arctica R. Br. FACU Arctic Blue Grass
Poa arida Vasey FAC Prairie Blue Grass
Poa arnowiae Soreng FACU Arnow's Blue Grass
Poa atropurpurea Scribn. FACW San Bernardino Blue Grass
Poa compressa L. FACU Flat‐Stem Blue Grass
Poa douglasii Nees FACU Seashore Blue Grass
Poa interior Rydb. FAC
Poa leibergii Scribn. FACU Leiberg's Blue Grass
Poa leptocoma Trin. FACW Marsh Blue Grass
Poa napensis Beetle OBL Napa Blue Grass
Poa nemoralis L. FAC Forest Blue Grass
Poa nervosa (Hook.) Vasey FACU Hooker's Blue Grass
Poa palustris L. FAC Fowl Blue Grass
Poa pratensis L. FAC Kentucky Blue Grass
Poa reflexa Vasey & Scribn. FAC Nodding Blue Grass
Poa secunda J. Presl FACU Curly Blue Grass
Poa stebbinsii Soreng FACU Subalpine Blue Grass
Poa stenantha Trin. FACU Narrow‐Flower Blue Grass
Poa trivialis L. FACW Rough‐Stalk Blue Grass
Poa unilateralis Scribn. FACU San Francisco Blue Grass
Podagrostis humilis (Vasey) Björkman FACW Alpine False Bent
Pogogyne abramsii J.T. Howell OBL San Diego Mesa‐Mint
Pogogyne clareana J.T. Howell FACU Santa Lucia Mesa‐Mint
Pogogyne douglasii Benth. OBL Douglas' Mesa‐Mint
Pogogyne floribunda Jokerst OBL Profuse‐Flower Mesa‐Mint
Pogogyne nudiuscula Gray OBL Otay Mesa‐Mint
Pogogyne serpylloides (Torr.) Gray FACW Thyme‐Leaf Mesa‐Mint
Pogogyne ziziphoroides Benth. OBL Sacramento Mesa‐Mint
Polanisia dodecandra (L.) DC. FACU Red‐Whisker Clammyweed
Polemonium foliosissimum Gray FAC Towering Jacob's‐Ladder
Polemonium micranthum Benth. FACU Annual Jacob's‐Ladder
Polemonium occidentale Greene FACW Western Jacob's‐Ladder
Polemonium pauciflorum S. Wats. FACW Few‐Flower Jacob's‐Ladder
Polyctenium fremontii (S. Wats.) Greene FAC Desert Combleaf
Polyctenium williamsiae Rollins FAC Washoe Combleaf
Polygala cornuta Kellogg FACW Sierran Milkwort
Polygala verticillata L. FACU Whorled Milkwort
Polygonatum biflorum (Walt.) Ell. FACU King Solomon's‐Seal
Polygonum achoreum Blake FACU Leathery Knotweed
Polygonum argyrocoleon Steud. ex Kunze FAC Silver‐Sheath Knotweed
Polygonum austiniae Greene FACU Mrs. Austin's Knotweed
Polygonum aviculare L. FACW Yard Knotweed
Polygonum douglasii Greene FACU Douglas' Knotweed
Polygonum engelmannii Greene FACU Engelmann's Knotweed
Polygonum erectum L. FACU Erect Knotweed
Polygonum fowleri B.L. Robins. FACW Fowler's Knotweed
Polygonum majus (Meisn.) Piper FACU Wiry Knotweed
Polygonum marinense Mert. & Raven OBL Marin Knotweed
Polygonum minimum S. Wats. FACU Zigzag Knotweed
Polygonum parryi Greene FAC Parry's Knotweed
Polygonum patulum Bieb. FACW Bellard's Knotweed
Polygonum polygaloides Wallich ex Meisn. FACW White‐Margin Knotweed
Polygonum ramosissimum Michx. FAC Yellow‐Flower Knotweed
Polygonum sawatchense Small FACU
Polygonum spergulariiforme Meisn. ex Small FACU Fall Knotweed
Polygonum striatulum B.L. Robins. FACW Striped Knotweed
Polypogon australis Brongn. FACW Chilean Rabbit's‐Foot Grass
Polypogon elongatus Kunth OBL Streambank Rabbit's‐Foot Grass
Polypogon fugax Nees ex Steud. FACU Hill Rabbit's‐Foot Grass
Polypogon interruptus Kunth FACW Ditch Rabbit's‐Foot Grass
Polypogon maritimus Willd. OBL Maritime Rabbit's‐Foot Grass
Polypogon monspeliensis (L.) Desf. FACW Annual Rabbit's‐Foot Grass
Polypogon viridis (Gouan) Breistr. FACW Beardless Rabbit's‐Foot Grass
Polypremum procumbens L. FACU Juniper‐Leaf
Polystichum lonchitis (L.) Roth FACU Northern Holly Fern
Polystichum munitum (Kaulfuss) K. Presl FACU Pineland Sword Fern
Populus angustifolia James FACW Narrow‐Leaf Cottonwood
Populus balsamifera L. FAC Balsam Poplar
Populus deltoides Bartr. ex Marsh. FAC Eastern Cottonwood
Populus tremuloides Michx. FACU Quaking Aspen
Populus X acuminata Rydb. (pro sp.) FAC
Populus X hinckleyana Correll (pro sp.) FAC
Porterella carnosula (Hook. & Arn.) Torr. OBL Porterplant
Portulaca halimoides L. FAC Silk‐Cotton Purslane
Portulaca oleracea L. FAC Little‐Hogweed
Portulaca pilosa L. FACU Kiss‐Me‐Quick
Portulaca umbraticola Kunth FACU Wing‐Pod Purslane
Potamogeton alpinus Balbis OBL Reddish Pondweed
Potamogeton amplifolius Tuckerman OBL Large‐Leaf Pondweed
Potamogeton clystocarpus Fern. OBL Little Aguja Pondweed
Potamogeton crispus L. OBL Curly Pondweed
Potamogeton diversifolius Raf. OBL Waterthread
Potamogeton epihydrus Raf. OBL Ribbon‐Leaf Pondweed
Potamogeton foliosus Raf. OBL Leafy Pondweed
Potamogeton friesii Rupr. OBL Flat‐Stalk Pondweed
Potamogeton gramineus L. OBL Grassy Pondweed
Potamogeton illinoensis Morong OBL Illinois Pondweed
Potamogeton natans L. OBL Floating Pondweed
Potamogeton nodosus Poir. OBL Long‐Leaf Pondweed
Potamogeton obtusifolius Mert. & Koch OBL Blunt‐Leaf Pondweed
Potamogeton praelongus Wulfen OBL White‐Stem Pondweed
Potamogeton pusillus L. OBL Small Pondweed
Potamogeton richardsonii (Benn.) Rydb. OBL Red‐Head Pondweed
Potamogeton robbinsii Oakes OBL Fern Pondweed
Potamogeton strictifolius Benn. OBL Straight‐Leaf Pondweed
Potamogeton zosteriformis Fern. OBL Flat‐Stem Pondweed
Potentilla argentea L. FACU Silver‐Leaf Cinquefoil
Potentilla basaltica Tiehm & Ertter FACW Soldier Meadows Cinquefoil
Potentilla biennis Greene FACW Biennial Cinquefoil
Potentilla diversifolia Lehm. FACU Mountain‐Meadow Cinquefoil
Potentilla drummondii Lehm. FAC Drummond's Cinquefoil
Potentilla flabellifolia Hook. ex Torr. & Gray FACW Fringe‐Leaf Cinquefoil
Potentilla glandulosa Lindl. FAC Sticky Cinquefoil
Potentilla gracilis Dougl. ex Hook. FAC Graceful Cinquefoil
Potentilla hickmanii Eastw. FACW Hickman's Cinquefoil
Potentilla millefolia Rydb. FACW Cut‐Leaf Cinquefoil
Potentilla multijuga Lehm. OBL Ballona Cinquefoil
Potentilla nana Willd. ex Schlecht. FAC Boreal Cinquefoil
Potentilla newberryi Gray OBL Newberry's Cinquefoil
Potentilla norvegica L. FAC Norwegian Cinquefoil
Potentilla paradoxa Nutt. FACW Bushy Cinquefoil
Potentilla pensylvanica L. FACU Pennsylvania Cinquefoil
Potentilla plattensis Nutt. FACW Platte River Cinquefoil
Potentilla rivalis Nutt. FACW Brook Cinquefoil
Potentilla rubricaulis Lehm. FACU Rocky Mountain Cinquefoil
Potentilla thurberi Gray FACW Scarlet Cinquefoil
Prenanthes racemosa Michx. FACU Purple Rattlesnake‐Root
Primula alcalina Cholewa & D. Henderson OBL Blue‐Dome Primrose
Primula angustifolia Torr. FACU Alpine Primrose
Primula capillaris N.& A. Holmgren FACW Ruby Mountain Primrose
Primula cusickiana (Gray) Gray FAC Wallowa Primrose
Primula egaliksensis Wormsk. ex Hornem. OBL Greenland Primrose
Primula incana M.E. Jones OBL Silvery Primrose
Primula parryi Gray FAC Brook Primrose
Primula rusbyi Greene FAC Rusby's Primrose
Primula suffrutescens Gray FAC Sierran Primrose
Primula tetrandra (Suksdorf ex Greene) A.R. Mast & Reveal FACW
Proboscidea louisianica (P. Mill.) Thellung FACU Ram's‐Horn
Prosartes trachycarpa S. Wats. FACU Rough‐Fruit Fairybells
Prosopis pubescens Benth. FAC American Screw‐Bean
Prosopis velutina Woot. FACU Velvet Mesquite
Prunella vulgaris L. FACU Common Selfheal
Prunus americana Marsh. FACU American Plum
Prunus caroliniana Ait. FACU Carolina Laurel Cherry
Prunus emarginata (Dougl. ex Hook.) D. Dietr. FACU Bitter Cherry
Prunus pensylvanica L. f. FACU Fire Cherry
Prunus serotina Ehrh. FACU Black Cherry
Prunus virginiana L. FAC Choke Cherry
Psathyrotes annua (Nutt.) Gray FACU Mealy Turtleback
Pseudognaphalium canescens (DC.) W.A. Weber FACU Wright's Rabbit‐Tobacco
Pseudognaphalium luteoalbum (L.) Hilliard & Burtt FAC Jersey Rabbit‐Tobacco
Pseudognaphalium stramineum (Kunth) A. Anderb. FAC Cotton‐Batting‐Plant
Pseudotsuga menziesii (Mirbel) Franco FACU Douglas‐Fir
Psidium cattleianum Sabine FACU Purple Strawberry Guava
Psilactis asteroides Gray FACW New Mexico Bare‐Ray‐Aster
Psilocarphus brevissimus Nutt. FACW Dwarf Woollyheads
Psilocarphus chilensis Gray FACW Chilean Woollyheads
Psilocarphus elatior (Gray) Gray FACW Tall Woollyheads
Psilocarphus oregonus Nutt. OBL Oregon Woollyheads
Psilocarphus tenellus Nutt. OBL Slender Woollyheads
Psilotum nudum (L.) Beauv. FACW Whisk Fern
Psorothamnus arborescens (Torr. ex Gray) Barneby FACU Mojave Smokebush
Pteridium aquilinum (L.) Kuhn FACU Northern Bracken Fern
Pteris vittata L. FACW Ladder Brake
Ptilagrostis kingii (Boland.) Barkworth FACU Sierran False Needle Grass
Puccinellia distans (Jacq.) Parl. FACW Spreading Alkali Grass
Puccinellia fasciculata (Torr.) Bickn. OBL Saltmarsh Alkali Grass
Puccinellia howellii J.I. Davis OBL Howell's Alkali Grass
Puccinellia lemmonii (Vasey) Scribn. FACW Lemmon's Alkali Grass
Puccinellia nutkaensis (J. Presl) Fern. & Weatherby OBL Nootka Alkali Grass
Puccinellia nuttalliana (J.A. Schultes) A.S. Hitchc. FACW Nuttall's Alkali Grass
Puccinellia parishii A.S. Hitchc. OBL Parish's Alkali Grass
Puccinellia pumila (Vasey) A.S. Hitchc. FACW Dwarf Alkali Grass
Puccinellia simplex Scribn. FACW California Alkali Grass
Pulicaria paludosa Link FAC Spanish False Fleabane
Pyrola asarifolia Michx. FAC Pink Wintergreen
Pyrola chlorantha Sw. FAC Green‐Flower Wintergreen
Pyrola minor L. FACU Snowline Wintergreen
Pyrrocoma hirta (Gray) Greene FAC Tacky Goldenweed
Pyrrocoma lanceolata (Hook.) Greene FAC Lance‐Leaf Goldenweed
Pyrrocoma racemosa (Nutt.) Torr. & Gray FAC Clustered Goldenweed
Pyrrocoma uniflora (Hook.) Greene FACW Plantain Goldenweed
Quercus lobata Née FACU Valley Oak
Quercus macrocarpa Michx. FAC Burr Oak
Quercus muehlenbergii Engelm. FAC Chinkapin Oak
Quercus virginiana P. Mill. FACU Live Oak
Quincula lobata (Torr.) Raf. FACU Chinese‐Lantern
Raillardella pringlei Greene OBL Showy Raillardella
Raillardella scaposa (Gray) Gray FACU Green‐Leaf Raillardella
Ranunculus abortivus L. FACW Kidney‐Leaf Buttercup
Ranunculus acriformis Gray FACW Sharp‐Leaf Buttercup
Ranunculus acris L. FACW Tall Buttercup
Ranunculus adoneus Gray FACW Alpine Buttercup
Ranunculus aestivalis (L. Benson) Van Buren & Harper FACW Fall Buttercup
Ranunculus alismifolius Geyer ex Benth. FACW Water‐Plantain Buttercup
Ranunculus aquatilis L. OBL White Water‐Crowfoot
Ranunculus arvensis L. FACU Hungerweed
Ranunculus bonariensis Poir. OBL Carter's Buttercup
Ranunculus bulbosus L. FACW St. Anthony's‐Turnip
Ranunculus californicus Benth. FACU California Buttercup
Ranunculus canus Benth. FAC Sacramento Valley Buttercup
Ranunculus cardiophyllus Hook. FACW Heart‐Leaf Buttercup
Ranunculus cymbalaria Pursh OBL Alkali Buttercup
Ranunculus eschscholtzii Schlecht. FAC Spruce‐Fir Buttercup
Ranunculus flabellaris Raf. OBL Greater Yellow Water Buttercup
Ranunculus flammula L. OBL Greater Creeping Spearwort
Ranunculus gelidus Kar. & Kir. FAC Arctic Buttercup
Ranunculus glaberrimus Hook. FAC Sagebrush Buttercup
Ranunculus gmelinii DC. FACW Lesser Yellow Water Buttercup
Ranunculus gormanii Greene FACW Gorman's Buttercup
Ranunculus hydrocharoides Gray OBL Frog‐Bit Buttercup
Ranunculus hyperboreus Rottb. OBL Far‐Northern Buttercup
Ranunculus inamoenus Greene FACW Graceful Buttercup
Ranunculus jovis A. Nels. FAC Hillside Buttercup
Ranunculus lobbii (Hiern.) Gray OBL Lobb's Water‐Crowfoot
Ranunculus longirostris Godr. OBL Long‐Beak Water‐Crowfoot
Ranunculus macauleyi Gray FACW Rocky Mountain Buttercup
Ranunculus macounii Britt. OBL Macoun's Buttercup
Ranunculus muricatus L. FACW Spiny‐Fruit Buttercup
Ranunculus occidentalis Nutt. FAC Western Buttercup
Ranunculus oreogenes Greene FACU Oregon Buttercup
Ranunculus orthorhynchus Hook. FACW Straight‐Beak Buttercup
Ranunculus parviflorus L. FAC Small‐Flower Buttercup
Ranunculus pedatifidus Sm. FAC Northern Buttercup
Ranunculus pensylvanicus L. f. FACW Pennsylvania Buttercup
Ranunculus populago Greene OBL Mountain Buttercup
Ranunculus pusillus Poir. OBL Low Spearwort
Ranunculus pygmaeus Wahlenb. FACW Dwarf Buttercup
Ranunculus ranunculinus (Nutt.) Rydb. FACU Tadpole Buttercup
Ranunculus repens L. FAC Creeping Buttercup
Ranunculus sardous Crantz FACW Hairy Buttercup
Ranunculus sceleratus L. OBL Cursed Buttercup
Ranunculus trichophyllus Chaix OBL Thread‐Leaf Water‐Crowfoot
Ranunculus trilobus Desf. FACU Three‐Lobe Buttercup
Ranunculus uncinatus D. Don ex G. Don FAC Woodland Buttercup
Rhamnus alnifolia L'Hér. OBL Alder‐Leaf Buckthorn
Rhamnus cathartica L. FAC European Buckthorn
Rhinanthus minor L. FACU Little Yellow‐Rattle
Rhodiola integrifolia Raf. FACU Entire‐Leaf Rosewort
Rhodiola rhodantha (Gray) Jacobsen FACW Queen's‐Crown
Rhododendron albiflorum Hook. FACU Cascade Azalea
Rhododendron occidentale (Torr. & Gray ex Torr.) Gray FAC Western Azalea
Rhus aromatica Ait. FACU Fragrant Sumac
Rhynchospora alba (L.) Vahl OBL White Beak Sedge
Rhynchospora californica Gale OBL California Beak Sedge
Rhynchospora capitellata (Michx.) Vahl OBL Brownish Beak Sedge
Rhynchospora globularis (Chapman) Small OBL Globe Beak Sedge
Ribes acerifolium T.J. Howell FACU Maple‐Leaf Currant
Ribes americanum P. Mill. FACW Wild Black Currant
Ribes aureum Pursh FAC Golden Currant
Ribes bracteosum Dougl. ex Hook. FAC California Black Currant
Ribes divaricatum Dougl. FAC Coastal Black Gooseberry
Ribes hudsonianum Richards. FACW Northern Black Currant
Ribes inerme Rydb. FAC White‐Stem Gooseberry
Ribes lacustre (Pers.) Poir. FACW Bristly Black Gooseberry
Ribes nevadense Kellogg FAC Sierran Currant
Ribes oxyacanthoides L. FACU Canadian Gooseberry
Ribes thacherianum (Jepson) Munz FACU Santa Cruz Gooseberry
Ribes triste Pallas OBL Swamp Red Currant
Ribes viscosissimum Pursh FAC Sticky Currant
Ribes wolfii Rothrock FAC Winaha Currant
Ricinus communis L. FACU Castor‐Bean
Rivina humilis L. FAC Rougeplant
Robinia pseudoacacia L. FACU Black Locust
Romanzoffia californica Greene FAC California Mistmaiden
Romanzoffia sitchensis Bong. FACW Sitka Mistmaiden
Rorippa austriaca (Crantz) Bess. FACW Austrian Yellowcress
Rorippa calycina (Engelm.) Rydb. FACW Persistent‐Sepal Yellowcress
Rorippa columbiae (Suksdorf ex B.L. Robins.) Suksdorf ex T.J. H OBL Columbian Yellowcress
Rorippa curvipes Greene FACW Blunt‐Leaf Yellowcress
Rorippa curvisiliqua (Hook.) Bess. ex Britt. OBL Curve‐Pod Yellowcress
Rorippa microtitis (B.L. Robins.) Rollins FACW Chihuahuan Yellowcress
Rorippa palustris (L.) Bess. OBL Bog Yellowcress
Rorippa ramosa Rollins FACW Durango Yellowcress
Rorippa sinuata (Nutt.) A.S. Hitchc. FACW Spreading Yellowcress
Rorippa sphaerocarpa (Gray) Britt. FACW Round‐Fruit Yellowcress
Rorippa subumbellata Rollins OBL Lake Tahoe Yellowcress
Rorippa sylvestris (L.) Bess. OBL Creeping Yellowcress
Rorippa tenerrima Greene FAC Modoc Yellowcress
Rorippa teres (Michx.) R. Stuckey FACW Southern Marsh Yellowcress
Rosa acicularis Lindl. FACU Prickly Rose
Rosa arkansana Porter FACU Prairie Rose
Rosa californica Cham. & Schlecht. FAC California Rose
Rosa gymnocarpa Nutt. FACU Bald‐Hip Rose
Rosa micrantha Borrer ex Sm. FACU Small‐Flower Sweetbrier
Rosa multiflora Thunb. ex Murr. FACU Rambler Rose
Rosa nutkana K. Presl FACU Nootka Rose
Rosa pisocarpa Gray FAC Clustered Rose
Rosa woodsii Lindl. FACU Woods' Rose
Rotala indica (Willd.) Koehne OBL Indian Toothcup
Rotala ramosior (L.) Koehne OBL Lowland Toothcup
Rottboellia cochinchinensis (Lour.) W.D. Clayton FAC Itch Grass
Rubus allegheniensis Porter FACU Allegheny Blackberry
Rubus arcticus L. FAC Northern Blackberry
Rubus arizonensis Focke FACU Arizona Dewberry
Rubus armeniacus Focke FACU Himalayan Blackberry
Rubus bartonianus M.E. Peck FACW Barton's Raspberry
Rubus flagellaris Willd. FACU Whiplash Dewberry
Rubus idaeus L. FACU Common Red Raspberry
Rubus laciniatus Willd. FACU Cut‐Leaf Blackberry
Rubus lasiococcus Gray FACU Hairy‐Fruit Smooth Dewberry
Rubus leucodermis Dougl. ex Torr. & Gray FACU White‐Stem Raspberry
Rubus parviflorus Nutt. FAC Western Thimble‐Berry
Rubus pedatus Sm. FACU Strawberry‐Leaf Raspberry
Rubus pubescens Raf. FAC Dwarf Red Raspberry
Rubus spectabilis Pursh FAC Salmon Raspberry
Rubus ursinus Cham. & Schlecht. FACU California Dewberry
Rubus vitifolius Cham. & Schlecht. FAC Pacific Dewberry
Rudbeckia alpicola Piper FACW Showy Coneflower
Rudbeckia californica Gray FACW California Coneflower
Rudbeckia glaucescens Eastw. FACW Waxy Coneflower
Rudbeckia hirta L. FACU Black‐Eyed‐Susan
Rudbeckia klamathensis P. Cox & Urbatsch FACW Klamath Coneflower
Rudbeckia laciniata L. FAC Green‐Head Coneflower
Rudbeckia montana Gray FACW Montane Coneflower
Rudbeckia occidentalis Nutt. FAC Western Coneflower
Rudbeckia triloba L. FACU Brown‐Eyed‐Susan
Rumex acetosa L. FAC Garden Sorrel
Rumex acetosella L. FACU Common Sheep Sorrel
Rumex altissimus Wood FACW Pale Dock
Rumex britannica L. OBL Greater Water Dock
Rumex californicus Rech. f. FACW California Willow Dock
Rumex conglomeratus Murr. FACW Sharp Dock
Rumex crassus Rech. f. FACW Fleshy Willow Dock
Rumex crispus L. FAC Curly Dock
Rumex densiflorus Osterhout FACW Dense‐Flower Dock
Rumex dentatus L. FACW Toothed Dock
Rumex fueginus Phil. FACW Tierra del Fuego Dock
Rumex hastatulus Baldw. FAC Heart‐Wing Sorrel
Rumex kerneri Borbás FACW Kerner's Dock
Rumex lacustris Greene OBL Lake Willow Dock
Rumex mexicanus Meisn. FAC Mexican Dock
Rumex obtusifolius L. FAC Bitter Dock
Rumex occidentalis S. Wats. FACW Western Dock
Rumex paucifolius Nutt. FAC Alpine Sheep Sorrel
Rumex persicarioides L. FACW Coastal Dock
Rumex pulcher L. FAC Fiddle Dock
Rumex salicifolius Weinm. FACW Willow Dock
Rumex spiralis Small FAC Winged Dock
Rumex stenophyllus Ledeb. FACW Narrow‐Leaf Dock
Rumex tomentellus Rech. f. OBL Mogollon Dock
Rumex transitorius Rech. f. FACW Pacific Willow Dock
Rumex triangulivalvis (Danser) Rech. f. FACW Triangular‐Valved Dock
Rumex verticillatus L. FACW Swamp Dock
Rumex violascens Rech. f. FACW Violet Dock
Ruppia cirrhosa (Petag.) Grande OBL Spiral Ditch‐Grass
Ruppia maritima L. OBL Beaked Ditch‐Grass
Sabatia angularis (L.) Pursh FAC Rose‐Pink
Saccharum ravennae (L.) L. FAC Ranenna Grass
Sagina apetala Ard. FAC Annual Pearlwort
Sagina decumbens (Ell.) Torr. & Gray FACU Trailing Pearlwort
Sagina maxima Gray FAC Sticky‐Stem Pearlwort
Sagina procumbens L. FAC Bird‐Eye Pearlwort
Sagina saginoides (L.) Karst. FACW Alpine Pearlwort
Sagittaria brevirostra Mackenzie & Bush OBL Short‐Beak Arrowhead
Sagittaria calycina Engelm. OBL Hooded Arrowhead
Sagittaria cuneata Sheldon OBL Arum‐Leaf Arrowhead
Sagittaria latifolia Willd. OBL Duck‐Potato
Sagittaria longiloba Engelm. ex J.G. Sm. OBL Long‐Barb Arrowhead
Sagittaria rigida Pursh OBL Sessile‐Fruit Arrowhead
Sagittaria sanfordii Greene OBL Valley Arrowhead
Salicornia bigelovii Torr. OBL Dwarf Saltwort
Salicornia depressa Standl. OBL Woody Saltwort
Salicornia rubra A. Nels. OBL Red Saltwort
Salix alba L. FACW White Willow
Salix amygdaloides Anderss. FACW Peach‐Leaf Willow
Salix arctica Pallas FAC Arctic Willow
Salix arizonica Dorn OBL Arizona Willow
Salix babylonica auct. non L. FACW
Salix barclayi Anderss. FACW Barclay's Willow
Salix barrattiana Hook. FACW Barratt's Willow
Salix bebbiana Sarg. FACW Gray Willow
Salix bonplandiana Kunth FACW Red Willow
Salix boothii Dorn FACW Booth's Willow
Salix brachycarpa Nutt. FACW Short‐Fruit Willow
Salix breweri Bebb FAC Brewer's Willow
Salix candida Flueggé ex Willd. OBL Sage Willow
Salix cascadensis Cockerell FACU Cascade Willow
Salix columbiana (Dorn) Argus FACW
Salix commutata Bebb OBL Under‐Green Willow
Salix delnortensis Schneid. FAC Del Norte Willow
Salix discolor Muhl. FACW Pussy Willow
Salix drummondiana Barratt ex Hook. FACW Drummond's Willow
Salix eastwoodiae Cockerell ex Heller FACW Sierran Willow
Salix eriocephala Michx. OBL Missouri Willow
Salix exigua Nutt. FACW Narrow‐Leaf Willow
Salix famelica (Ball) Argus FACW
Salix farriae Ball OBL Farr's Willow
Salix fragilis L. FAC Crack Willow
Salix geyeriana Anderss. OBL Geyer's Willow
Salix glauca L. FACW Gray‐Leaf Willow
Salix gooddingii Ball FACW Goodding's Black Willow
Salix hookeriana Barratt ex Hook. FACW Coastal Willow
Salix interior Rowlee FACW Sandbar Willow
Salix irrorata Anderss. FACW Dewy‐Stem Willow
Salix jepsonii Schneid. OBL Jepson's Willow
Salix laevigata Bebb FACW Polished Willow
Salix lasiandra Benth. FACW
Salix lasiolepis Benth. FACW Arroyo Willow
Salix lemmonii Bebb FACW Lemmon's Willow
Salix ligulifolia (Ball) Ball ex Schneid. FACW Strap‐Leaf Willow
Salix lutea Nutt. OBL Yellow Willow
Salix maccalliana Rowlee FACW Mccalla's Willow
Salix matsudana Koidzumi FAC Corkscrew Willow
Salix melanopsis Nutt. OBL Dusky Willow
Salix monochroma Ball FACW One‐Color Willow
Salix monticola Bebb OBL Park Willow
Salix myrtillifolia Anderss. FACW Blueberry Willow
Salix nivalis Hook. FACW Snow Willow
Salix orestera Schneid. FACW Gray‐Leaf Sierran Willow
Salix pedicellaris Pursh OBL Bog Willow
Salix planifolia Pursh OBL Tea‐Leaf Willow
Salix prolixa Anderss. OBL Mackenzie's Willow
Salix pseudomonticola Ball FACW False Mountain Willow
Salix purpurea L. FACW Purple Willow
Salix reticulata L. FAC Net‐Vein Willow
Salix rotundifolia Trautv. FACW Round‐Leaf Willow
Salix scouleriana Barratt ex Hook. FAC Scouler's Willow
Salix serissima (Bailey) Fern. OBL Autumn Willow
Salix sitchensis Sanson ex Bong. FACW Sitka Willow
Salix taxifolia Kunth FACW Yew‐Leaf Willow
Salix thurberi Rowlee FAC
Salix tracyi Ball FACW Tracy's Willow
Salix tweedyi (Bebb ex Rose) Ball FACW Tweedy's Willow
Salix vestita Pursh FAC Rock Willow
Salix viminalis L. FACW Basket Willow
Salix wolfii Bebb OBL Idaho Willow
Salix X pendulina Wenderoth FACW
Salix X sepulcralis Simonkai FACW
Salsola soda L. FACW Opposite‐Leaf Russian‐Thistle
Salsola tragus L. FACU Prickly Russian‐Thistle
Salvia lycioides Gray FACU Canyon Sage
Salvinia minima Baker OBL Water‐Spangles
Salvinia molesta Mitchell OBL Kariba‐Weed
Sambucus nigra L. FAC Black Elder
Sambucus racemosa L. FACU Red Elder
Samolus ebracteatus Kunth FACW Limewater Brookweed
Samolus vagans Greene OBL Chiricahua Mountain Brookweed
Samolus valerandi L. OBL Seaside Brookweed
Sanguisorba canadensis L. FACW Canadian Burnet
Sanguisorba minor Scop. FACU Salad Burnet
Sanguisorba officinalis L. FACW Great Burnet
Sanicula marilandica L. FAC Maryland Black‐Snakeroot
Sanicula maritima Kellogg ex S. Wats. FACW Adobe Black‐Snakeroot
Sapindus saponaria L. FACU Wing‐Leaf Soapberry
Saponaria officinalis L. FACU Bouncing‐Bett
Sarcobatus vermiculatus (Hook.) Torr. FAC Greasewood
Sarcocornia ambigua (Michx.) M.A.Alonso & M.B.Crespo OBL Chickenclaws
Sarcocornia pacifica (Standl.) A.J. Scott OBL Pacific Swampfire
Sarcocornia utahensis (Tidestrom) A.J. Scott OBL Utah Swampfire
Sarracenia purpurea L. OBL Purple Pitcherplant
Sarracenia rubra Walt. OBL Sweet Pitcherplant
Saussurea americana D.C. Eat. FACW American Saw‐Wort
Saxifraga adscendens L. FACW Wedge‐Leaf Saxifrage
Saxifraga aprica Greene FACW Sierran Saxifrage
Saxifraga bronchialis L. FACU Yellow‐Spot Saxifrage
Saxifraga caespitosa L. FAC Tufted Alpine Saxifrage
Saxifraga californica Greene FACW California Saxifrage
Saxifraga cernua L. FACW Nodding Saxifrage
Saxifraga chrysantha Gray FACU Golden Saxifrage
Saxifraga ferruginea Graham FAC Russet‐Hair Saxifrage
Saxifraga hirculus L. OBL Yellow Marsh Saxifrage
Saxifraga howellii Greene FAC Howell's Saxifrage
Saxifraga integrifolia Hook. FACW Columbian Saxifrage
Saxifraga lyallii Engl. FACW Red‐Stem Saxifrage
Saxifraga marshallii Greene OBL Hupa Valley Saxifrage
Saxifraga mertensiana Bong. FACW Woodland Saxifrage
Saxifraga nelsoniana D. Don FAC Heart‐Leaf Saxifrage
Saxifraga nidifica Greene FACW Peak Saxifrage
Saxifraga occidentalis S. Wats. FAC Mountain Saxifrage
Saxifraga odontoloma Piper FACW Streambank Saxifrage
Saxifraga oppositifolia L. FACU Purple Mountain Saxifrage
Saxifraga oregana T.J. Howell OBL Bog Saxifrage
Saxifraga rhomboidea Greene FACW Diamond‐Leaf Saxifrage
Saxifraga rivularis L. FACW Alpine‐Brook Saxifrage
Saxifraga tolmiei Torr. & Gray FAC Tolmie's Alpine Saxifrage
Sceptridium multifidum (Gmel.) Nishida ex Tagawa FAC Leathery Grape Fern
Scheuchzeria palustris L. OBL Rannoch‐Rush
Schinus terebinthifolius Raddi FAC Brazilian Peppertree
Schizachne purpurascens (Torr.) Swallen FACU False Melic Grass
Schizachyrium littorale (Nash) Bickn. FACU Dune False Bluestem
Schizachyrium scoparium (Michx.) Nash FACU Little False Bluestem
Schoenoplectus acutus (Muhl. ex Bigelow) A.& D. Löve OBL Hard‐Stem Club‐Rush
Schoenoplectus americanus (Pers.) Volk. ex Schinz & R. Keller OBL Chairmaker's Club‐Rush
Schoenoplectus californicus (C.A. Mey.) Palla OBL California Club‐Rush
Schoenoplectus fluviatilis (Torr.) M.T. Strong OBL River Club‐Rush
Schoenoplectus glaucus (Lam.) Kartesz OBL Tuberous Club‐Rush
Schoenoplectus heterochaetus (Chase) Soják OBL Pale Great Club‐Rush
Schoenoplectus maritimus (L.) Lye OBL Saltmarsh Club‐Rush
Schoenoplectus mucronatus (L.) Palla OBL Bog Club‐Rush
Schoenoplectus pungens (Vahl) Palla OBL Three‐Square
Schoenoplectus robustus (Pursh) M.T. Strong OBL Seaside Club‐Rush
Schoenoplectus saximontanus (Fern.) Raynal OBL Rocky Mountain Club‐Rush
Schoenoplectus subterminalis (Torr.) Soják OBL Swaying Club‐Rush
Schoenoplectus tabernaemontani (K.C. Gmel.) Palla OBL Soft‐Stem Club‐Rush
Schoenus nigricans L. OBL Black Bog‐Rush
Scirpus congdonii Britt. FACW Congdon's Bulrush
Scirpus cyperinus (L.) Kunth OBL Cottongrass Bulrush
Scirpus diffusus Schuyler FACW Umbrella Bulrush
Scirpus microcarpus J.& K. Presl OBL Red‐Tinge Bulrush
Scirpus nevadensis S. Wats. OBL Nevada Bulrush
Scirpus pallidus (Britt.) Fern. OBL Pale Bulrush
Scirpus pendulus Muhl. OBL Rufous Bulrush
Scleranthus annuus L. FACU Annual Knawel
Sclerolinon digynum (Gray) Rogers FACW Northwestern Yellow‐Flax
Scolochloa festucacea (Willd.) Link OBL Common River Grass
Scrophularia atrata Pennell FACU Black‐Flower Figwort
Scrophularia californica Cham. & Schlecht. FAC California Figwort
Scrophularia lanceolata Pursh FAC Lance‐Leaf Figwort
Scutellaria bolanderi Gray FACW Sierran Skullcap
Scutellaria galericulata L. OBL Hooded Skullcap
Scutellaria lateriflora L. FACW Mad Dog Skullcap
Scutellaria siphocampyloides Vatke FACU Gray‐Leaf Skullcap
Sedella congdonii (Eastw.) Britt. & Rose FACU Congdon's Mock Stonecrop
Sedella leiocarpa H.K. Sharsmith FAC Lake County Mock Stonecrop
Sedella pumila (Benth.) Britt. & Rose FAC Sierran Mock Stonecrop
Selaginella kraussiana (Kunze) A. Braun FACW Krauss' Spike‐Moss
Selaginella selaginoides (L.) Beauv. ex Mart. & Schrank FACW Northern Spike‐Moss
Selenia dissecta Torr. & Gray FACW Texas Selenia
Selenia jonesii Cory FACW Jones' Selenia
Senecio amplectens Gray FACW Showy Alpine Ragwort
Senecio clarkianus Gray FACW Clark's Ragwort
Senecio crassulus Gray FACU Thick‐Leaf Ragwort
Senecio eremophilus Richards. FACU Desert Ragwort
Senecio hydrophiloides Rydb. FACW Stout Meadow Ragwort
Senecio hydrophilus Nutt. OBL Alkali‐Marsh Ragwort
Senecio integerrimus Nutt. FACU Lamb‐Tongue Ragwort
Senecio jacobaea L. FACU Tansy Ragwort
Senecio lugens Richards. FAC Small Black‐Tip Ragwort
Senecio scorzonella Greene FAC Sierran Ragwort
Senecio serra Hook. FACU Tall Ragwort
Senecio sphaerocephalus Greene FACW Mountain‐Marsh Ragwort
Senecio triangularis Hook. FACW Arrow‐Leaf Ragwort
Senecio vulgaris L. FACU Old‐Man‐in‐the‐Spring
Senna alata (L.) Roxb. FACU Emperor's‐Candlesticks
Senna hirsuta (L.) Irwin & Barneby FACU Woolly Wild Sensitive‐Plant
Senna pendula (Humb. & Bonpl. ex Willd.) Irwin & Barneb FAC Valamuerto
Sesbania emerus (Aubl.) Urban FAC Danglepod
Sesbania exaltata (Raf.) Rydb. ex A.W. Hill FACW Peatree
Sesbania punicea (Cav.) Benth. FACW Purple River‐Hemp
Sesuvium maritimum (Walt.) B.S.P. FACW Slender Sea‐Purslane
Sesuvium portulacastrum (L.) L. FACW Shoreline Sea‐Purslane
Sesuvium verrucosum Raf. FACW Verrucose Sea‐Purslane
Setaria adhaerens (Forssk.) Chiov. FACU Adherent Bristle Grass
Setaria italica (L.) Beauv. FACU Italian Bristle Grass
Setaria magna Griseb. FACW Giant Bristle Grass
Setaria parviflora (Poir.) Kerguélen FAC Marsh Bristle Grass
Setaria pumila (Poir.) Roemer & J.A. Schultes FAC Yellow Bristle Grass
Setaria sphacelata (Schumacher) Moss ex Stapf & C.E. Hubbar OBL African Bristle Grass
Setaria verticillata (L.) Beauv. FACU Rough Bristle Grass
Setaria verticilliformis Dumort. FAC Foreward‐Barb Bristle Grass
Shepherdia argentea (Pursh) Nutt. FACU Silver Buffalo‐Berry
Sibara virginica (L.) Rollins FAC Virginia Winged‐Rockcress
Sibbaldia procumbens L. FACU Creeping‐Glow‐Wort
Sida rhombifolia L. FACU Cuban‐Jute
Sidalcea calycosa M.E. Jones OBL Annual Checker‐Mallow
Sidalcea candida Gray FACW White Checker‐Mallow
Sidalcea covillei Greene FACU Owens Valley Checker‐Mallow
Sidalcea cusickii Piper FACW Cusick's Checker‐Mallow
Sidalcea hirsuta Gray ex Benth. OBL Hairy Checker‐Mallow
Sidalcea malviflora (DC.) Gray ex Benth. FACW Dwarf Checker‐Mallow
Sidalcea neomexicana Gray FACW Rocky Mountain Checker‐Mallow
Sidalcea oregana (Nutt. ex Torr. & Gray) Gray FACW Oregon Checker‐Mallow
Sidalcea pedata Gray OBL Mountain Checker‐Mallow
Sidalcea ranunculacea Greene OBL Marsh Checker‐Mallow
Sidalcea reptans Greene OBL Sierran Checker‐Mallow
Sidalcea stipularis J.T. Howell & True OBL Scadden Flat Checker‐Mallow
Sideroxylon lanuginosum Michx. FACU Gum Bully
Silene hitchguirei Bocquet OBL Mountain Catchfly
Silene menziesii Hook. FAC White Catchfly
Silene uralensis (Rupr.) Bocquet FACW Apetalous Catchfly
Sisymbrium altissimum L. FACU Tall Hedge‐Mustard
Sisyrinchium bellum S. Wats. FACW California Blue‐Eyed‐Grass
Sisyrinchium californicum (Ker‐Gawl.) Dry. FACW Golden Blue‐Eyed‐Grass
Sisyrinchium cernuum (Bickn.) Kearney FAC Nodding Blue‐Eyed‐Grass
Sisyrinchium demissum Greene OBL Stiff Blue‐Eyed‐Grass
Sisyrinchium elmeri Greene OBL Elmer's Blue‐Eyed‐Grass
Sisyrinchium funereum Bickn. FACW Funeral Mountain Blue‐Eyed‐Grass
Sisyrinchium halophilum Greene FACW Nevada Blue‐Eyed‐Grass
Sisyrinchium idahoense Bickn. FACW Idaho Blue‐Eyed‐Grass
Sisyrinchium longipes (Bickn.) Kearney & Peebles FACW Timberland Blue‐Eyed‐Grass
Sisyrinchium minus Engelm. & Gray FACU Dwarf Blue‐Eyed‐Grass
Sisyrinchium montanum Greene FACW Strict Blue‐Eyed‐Grass
Sisyrinchium sarmentosum Suksdorf ex Greene OBL Mountain Blue‐Eyed‐Grass
Sisyrinchium septentrionale Bickn. FACW Northern Blue‐Eyed‐Grass
Sium suave Walt. OBL Hemlock Water‐Parsnip
Smilax jamesii G. Wallace FACW English Peak Greenbrier
Solanum americanum P. Mill. FACU American Black Nightshade
Solanum carolinense L. FACU Carolina Horse‐Nettle
Solanum douglasii Dunal FAC Green‐Spot Nightshade
Solanum dulcamara L. FAC Climbing Nightshade
Solanum erianthum D. Don FAC Potato‐Tree
Solanum nigrum L. FACU European Black Nightshade
Solanum ptycanthum Dunal FACU Eastern Black Nightshade
Solidago altissima L. FACU Tall Goldenrod
Solidago confinis Gray OBL Southern Goldenrod
Solidago elongata Nutt. FACU Cascade Canada Goldenrod
Solidago gigantea Ait. FACW Late Goldenrod
Solidago lepida DC. FAC Western Canada Goldenrod
Solidago multiradiata Ait. FACU Rocky Mountain Goldenrod
Solidago simplex Kunth FACU Mt. Albert Goldenrod
Solidago spathulata DC. FACU Coast Goldenrod
Solidago spectabilis (D.C. Eat.) Gray FACW Nevada Goldenrod
Soliva sessilis Ruiz & Pavón FACU Lawn Burrweed
Sonchus arvensis L. FACU Field Sow‐Thistle
Sonchus asper (L.) Hill FAC Spiny‐Leaf Sow‐Thistle
Sorbus scopulina Greene FACU Cascade Mountain‐Ash
Sorbus sitchensis M. Roemer FAC Sitka Mountain‐Ash
Sorghastrum nutans (L.) Nash FACU Yellow Indian Grass
Sorghum bicolor (L.) Moench FACU Broom‐Corn
Sorghum halepense (L.) Pers. FACU Johnson Grass
Sparganium angustifolium Michx. OBL Narrow‐Leaf Burr‐Reed
Sparganium emersum Rehmann OBL European Burr‐Reed
Sparganium erectum L. OBL Simple‐Stem Burr‐Reed
Sparganium eurycarpum Engelm. ex Gray OBL Broad‐Fruit Burr‐Reed
Sparganium fluctuans (Engelm. ex Morong) B.L. Robins. OBL Floating Burr‐Reed
Sparganium natans L. OBL Arctic Burr‐Reed
Spartina alterniflora Loisel. OBL Saltwater Cord Grass
Spartina densiflora Brongn. OBL Dense‐Flower Cord Grass
Spartina foliosa Trin. OBL California Cord Grass
Spartina gracilis Trin. FACW Alkali Cord Grass
Spartina patens (Ait.) Muhl. OBL Salt‐Meadow Cord Grass
Spartina pectinata Bosc ex Link OBL Freshwater Cord Grass
Spergularia atrosperma R.P. Rossb. FACW Black‐Seed Sandspurry
Spergularia bocconi (Scheele) Graebn. FACW Boccone's Sandspurry
Spergularia canadensis (Pers.) G. Don FACW Canadian Sandspurry
Spergularia diandra (Guss.) Held. FACW Alkali Sandspurry
Spergularia macrotheca (Hornem. ex Cham. & Schlecht.) Heynh. FAC Sticky Sandspurry
Spergularia maritima (All.) Chiov. FACW Satin‐Flower
Spergularia platensis (Camb.) Fenzl OBL La Plata Sandspurry
Spergularia rubra (L.) J.& K. Presl FAC Ruby Sandspurry
Spergularia salina J.& K. Presl OBL Saltmarsh Sandspurry
Spermolepis divaricata (Walt.) Raf. ex Ser. FACW Rough‐Fruit Scaleseed
Spermolepis echinata (Nutt. ex DC.) Heller FACU Bristly‐Fruit Scaleseed
Sphaerophysa salsula (Pallas) DC. FACU Red Bladder‐Vetch
Sphenopholis obtusata (Michx.) Scribn. FAC Prairie Wedgescale
Sphenosciadium capitellatum Gray FACW Swamp Whiteheads
Spinulum annotinum (L.) Haines FAC
Spiraea betulifolia Pallas FACU Shiny‐Leaf Meadowsweet
Spiraea douglasii Hook. FACW Douglas' Meadowsweet
Spiraea X hitchcockii Hess & Stoynoff FAC
Spiranthes delitescens Sheviak OBL Madrean Ladies'‐Tresses
Spiranthes diluvialis Sheviak FACW Diluvim Ladies'‐Tresses
Spiranthes infernalis Sheviak FACW Ash Meadows Ladies'‐Tresses
Spiranthes magnicamporum Sheviak FAC Great Plains Ladies'‐Tresses
Spiranthes porrifolia Lindl. FACW Western Ladies'‐Tresses
Spiranthes romanzoffiana Cham. FACW Hooded Ladies'‐Tresses
Spirodela polyrrhiza (L.) Schleid. OBL Common Duckmeat
Sporobolus airoides (Torr.) Torr. FAC Alkali‐Sacaton
Sporobolus cryptandrus (Torr.) Gray FACU Sand Dropseed
Sporobolus flexuosus (Thurb. ex Vasey) Rydb. FACU Mesa Dropseed
Sporobolus giganteus Nash FACU Giant Dropseed
Sporobolus indicus (L.) R. Br. FACU Smut Grass
Sporobolus pyramidatus (Lam.) A.S. Hitchc. FACU Target Dropseed
Sporobolus texanus Vasey FACW Texas Dropseed
Stachys ajugoides Benth. OBL Bugle Hedge‐Nettle
Stachys albens Gray OBL White‐Stem Hedge‐Nettle
Stachys chamissonis Benth. OBL Coastal Hedge‐Nettle
Stachys coccinea Ortega FAC Scarlet Hedge‐Nettle
Stachys crenata Raf. FAC Mouse's‐Ear
Stachys floridana Shuttlw. ex Benth. FAC Florida Hedge‐Nettle
Stachys mexicana Benth. FACW Mexican Hedge‐Nettle
Stachys pilosa Nutt. FACW Hairy Hedge‐Nettle
Stachys pycnantha Benth. FACW Short‐Spike Hedge‐Nettle
Stachys rigida Nutt. ex Benth. FACW Rough Hedge‐Nettle
Stachys stricta Greene OBL Sonoma Hedge‐Nettle
Steinchisma hians (Ell.) Nash FACW Gaping Grass
Stellaria borealis Bigelow FACW Boreal Starwort
Stellaria calycantha (Ledeb.) Bong. FACW Northern Bog Starwort
Stellaria crassifolia Ehrh. FACW Fleshy Starwort
Stellaria crispa Cham. & Schlecht. FAC Ruffled Starwort
Stellaria cuspidata Willd. ex Schlecht. FAC Mexican Starwort
Stellaria graminea L. FAC Grass‐Leaf Starwort
Stellaria humifusa Rottb. OBL Saltmarsh Starwort
Stellaria littoralis Torr. OBL Beach Starwort
Stellaria longifolia Muhl. ex Willd. FACW Long‐Leaf Starwort
Stellaria longipes Goldie FACW Long‐Stalk Starwort
Stellaria media (L.) Vill. FACU Common Chickweed
Stellaria obtusa Engelm. FACW Rocky Mountain Starwort
Stellaria umbellata Turcz. ex Kar. & Kir. FACW Umbrella Starwort
Stemodia durantifolia (L.) Sw. OBL White‐Woolly Twintip
Stenotaphrum secundatum (Walt.) Kuntze FAC St. Augustine Grass
Streptopus amplexifolius (L.) DC. FAC Clasping Twistedstalk
Streptopus lanceolatus (Ait.) Reveal FAC Lance‐Leaf Twistedstalk
Strophostyles helvola (L.) Ell. FACU Trailing Fuzzy‐Bean
Stuckenia filiformis (Pers.) Börner OBL Slender‐Leaf False Pondweed
Stuckenia pectinata (L.) Böerner OBL Sago False Pondweed
Stuckenia striata (Ruiz & Pavón) Holub OBL Striped False Pondweed
Stuckenia vaginata (Turcz.) Holub OBL Sheathed False Pondweed
Styrax platanifolius Engelm. FAC Sycamore‐Leaf Snowbell
Suaeda calceoliformis (Hook.) Moq. FACW Paiuteweed
Suaeda californica S. Wats. FACW Broom Seepweed
Suaeda esteroa Ferren & Whitmore FACW Seablite
Suaeda mexicana (Standl.) Standl. FACW Mexican Seepweed
Suaeda nigra (Raf.) J.F. Macbr. OBL Shrubby Seepweed
Suaeda occidentalis (S. Wats.) S. Wats. FACW Western Seepweed
Suaeda taxifolia (Standl.) Standl. FACW Needle‐Leaf Seepweed
Subularia aquatica L. OBL American Water‐Awlwort
Suckleya suckleyana (Torr.) Rydb. FACW Poison Suckleya
Suksdorfia ranunculifolia (Hook.) Engl. FAC Buttercup‐Leaf Mock Brookfoam
Suksdorfia violacea Gray FAC Violet Mock Brookfoam
Sullivantia hapemanii (Coult. & Fisher) Coult. FACW Hapeman's Coolwort
Swertia perennis L. FACW Felwort
Symphoricarpos albus (L.) Blake FACU Common Snowberry
Symphoricarpos occidentalis Hook. FAC Western Snowberry
Symphyotrichum ascendens (Lindl.) Nesom FAC Western American‐Aster
Symphyotrichum boreale (Torr. & Gray) A.& D. Löve OBL Boreal American‐Aster
Symphyotrichum chilense (Nees) Nesom FAC Pacific American‐Aster
Symphyotrichum ciliatum (Ledeb.) Nesom FACW Alkali American‐Aster
Symphyotrichum defoliatum (Parish) Nesom OBL San Bernardino American‐Aster
Symphyotrichum eatonii (Gray) Nesom FAC Bracted American‐Aster
Symphyotrichum ericoides (L.) Nesom FAC White Heath American‐Aster
Symphyotrichum falcatum (Lindl.) Nesom FACU Rough White Prairie American‐Aster
Symphyotrichum frondosum (Nutt.) Nesom FACW Leafy American‐Aster
Symphyotrichum laeve (L.) A.& D. Löve FACU Smooth Blue American‐Aster
Symphyotrichum lanceolatum (Willd.) Nesom OBL White Panicled American‐Aster
Symphyotrichum lentum (Greene) Nesom OBL Suisun Marsh American‐Aster
Symphyotrichum novae‐angliae (L.) Nesom FACW New England American‐Aster
Symphyotrichum pilosum (Willd.) Nesom FACU White Oldfield American‐Aster
Symphyotrichum porteri (Gray) Nesom FACU Smooth White American‐Aster
Symphyotrichum praealtum (Poir.) Nesom OBL Willow‐Leaf American‐Aster
Symphyotrichum spathulatum (Lindl.) Nesom FAC Mountain American‐Aster
Symphyotrichum squamatum (Spreng.) Nesom OBL
Symphyotrichum subspicatum (Nees) Nesom FACW Leafy‐Bract American‐Aster
Symphyotrichum subulatum (Michx.) Nesom OBL Seaside American‐Aster
Symphytum asperum Lepechin FACW Prickly Comfrey
Synthyris ranunculina Pennell OBL Charleston Mountain Kitten's‐Tail
Tamarix aphylla (L.) Karst. FAC Athel Tamarisk
Tamarix chinensis Lour. FAC Five‐Stamen Tamarisk
Tamarix gallica L. FACW French Tamarisk
Tamarix parviflora DC. FAC Small‐Flower Tamarisk
Tanacetum vulgare L. FACU Common Tansy
Taraxacum californicum Munz & Johnston FACW California Dandelion
Taraxacum officinale G.H. Weber ex Wiggers FACU Common Dandelion
Tauschia tenuissima (Geyer ex Hook.) Mathias & Constance FACW Leiberg's Umbrella‐Wort
Taxodium distichum (L.) L.C. Rich. OBL Southern Bald‐Cypress
Taxus brevifolia Nutt. FACU Pacific Yew
Tellima grandiflora (Pursh) Dougl. ex Lindl. FACU Fragrant Fringecup
Teucrium canadense L. FACW American Germander
Teucrium chamaedrys L. FACU Wall Germander
Teucrium cubense Jacq. FACW Small Coastal Germander
Thalictrum alpinum L. FACW Alpine Meadow‐Rue
Thalictrum dasycarpum Fisch. & Avé‐Lall. FACW Purple Meadow‐Rue
Thalictrum fendleri Engelm. ex Gray FAC Fendler's Meadow‐Rue
Thalictrum occidentale Gray FACU Western Meadow‐Rue
Thalictrum revolutum DC. FACU Waxy‐Leaf Meadow‐Rue
Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey. FAC Few‐Flower Meadow‐Rue
Thalictrum venulosum Trel. FACU Veiny‐Leaf Meadow‐Rue
Thelypodium crispum Greene ex Payson FACU Crisped Thelypody
Thelypodium integrifolium (Nutt.) Endl. ex Walp. FACW Entire‐Leaf Thelypody
Thelypodium sagittatum (Nutt. ex Torr. & Gray) Endl. ex Walp. FACW Arrowhead Thelypody
Thelypodium stenopetalum S. Wats. FAC Slender‐Petal Thelypody
Thelypteris ovata R. St. John FACW Ovate Marsh Fern
Thelypteris puberula (Baker) Morton FACW Showy Maiden Fern
Thermopsis divaricarpa A. Nels. FAC Spread‐Fruit Golden‐Banner
Thermopsis montana Nutt. FAC Montane Golden‐Banner
Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. FACU Prairie Golden‐Banner
Thuja plicata Donn ex D. Don FAC Western Arborvitae
Tiarella trifoliata L. FAC Three‐Leaf Foamflower
Tilia americana L. FACU American Basswood
Tithonia thurberi Gray FACW Arizona Sunflower‐Weed
Tolmiea menziesii (Pursh) Torr. & Gray FACW Piggyback‐Plant
Torreyochloa erecta (A.S. Hitchc.) Church OBL Spiked False Manna Grass
Torreyochloa pallida (Torr.) Church OBL Pale False Manna Grass
Toxicodendron radicans (L.) Kuntze FAC Eastern Poison‐Ivy
Toxicodendron rydbergii (Small ex Rydb.) Greene FACU Western Poison‐Ivy
Toxicoscordion micranthus (Eastw.) Heller OBL Small‐Flower Poison Camas
Toxicoscordion venenosum (S. Wats.) Rydb. FACU Meadow Poison Camas
Tradescantia fluminensis Vell. FAC Small‐Leaf Wandering‐Jew
Tradescantia occidentalis (Britt.) Smyth FACU Prairie Spiderwort
Tradescantia ohiensis Raf. FACW Bluejacket
Tradescantia wrightii Rose & Bush FACW Wright's Spiderwort
Trautvetteria caroliniensis (Walt.) Vail FACW Carolina Tassel‐Rue
Triadica sebifera (L.) Small FAC Chinese Tallowtree
Trianthema portulacastrum L. FAC Desert Horse‐Purslane
Trichloris crinita (Lag.) Parodi FACU False Rhodes Grass
Trichocoronis wrightii (Torr. & Gray) Gray FACW Limestone Bugheal
Trichophorum caespitosum (L.) Hartman OBL Tufted Leafless‐Bulrush
Trichophorum clementis (M.E. Jones) S.G. Sm. FAC Yosemite Leafless‐Bulrush
Trichophorum pumilum (Vahl) Schinz & Thellung FACW Rolland's Leafless‐Bulrush
Trichostema austromontanum F.H. Lewis OBL San Jacinto Bluecurls
Trichostema lanceolatum Benth. FACU Vinegar‐Weed
Trichostema micranthum Gray FAC Small‐Flower Bluecurls
Tridens albescens (Vasey) Woot. & Standl. FACU White Fluff Grass
Tridens muticus (Torr.) Nash FAC Awnless Fluff Grass
Trientalis borealis Raf. FAC Maystar
Trientalis europaea L. FAC Arctic Starflower
Trifolium albopurpureum Torr. & Gray FACU Rancheria Clover
Trifolium amabile Kunth OBL Aztec Clover
Trifolium amoenum Greene FACW Showy Indian Clover
Trifolium barbigerum Torr. FACW Bearded Clover
Trifolium beckwithii Brewer ex S. Wats. FAC Plumas Clover
Trifolium bolanderi Gray OBL Parasol Clover
Trifolium cyathiferum Lindl. FAC Bowl Clover
Trifolium depauperatum Desv. FAC Balloon Sack Clover
Trifolium douglasii House FACW Douglas' Clover
Trifolium eriocephalum Nutt. FAC Woolly‐Head Clover
Trifolium fragiferum L. FACU Strawberry‐Head Clover
Trifolium fucatum Lindl. FACU Sour Clover
Trifolium haydenii Porter FACU Hayden's Clover
Trifolium howellii S. Wats. FACW Canyon Clover
Trifolium hybridum L. FAC Alsike Clover
Trifolium kingii S. Wats. FAC King's Clover
Trifolium longipes Nutt. FACW Long‐Stalk Clover
Trifolium macrocephalum (Pursh) Poir. FACU Large‐Head Clover
Trifolium microcephalum Pursh FAC Small‐Head Clover
Trifolium monanthum Gray FAC Mountain Carpet Clover
Trifolium mucronatum Willd. ex Spreng. FACW Cusp Clover
Trifolium neurophyllum Greene FACW White Mountain Clover
Trifolium obtusiflorum Hook. f. FAC Clammy Clover
Trifolium parryi Gray FAC Parry's Clover
Trifolium pinetorum Greene FACW Pinewoods Clover
Trifolium polyodon Greene FACW Pacific Grove Clover
Trifolium pratense L. FACU Red Clover
Trifolium productum Greene FAC Shasta Clover
Trifolium repens L. FACU White Clover
Trifolium variegatum Nutt. FAC White‐Tip Clover
Trifolium willdenowii Spreng. FACW Springbank Clover
Trifolium wormskioldii Lehm. FACW Cow Clover
Triglochin concinna Burtt‐Davy OBL Slender Arrow‐Grass
Triglochin maritima L. OBL Seaside Arrow‐Grass
Triglochin palustris L. OBL Marsh Arrow‐Grass
Triglochin striata Ruiz & Pavón OBL Three‐Rib Arrow‐Grass
Trillium albidum J.D. Freeman FACU Giant White Wakerobin
Trillium ovatum Pursh FACU Western Wakerobin
Triodanis perfoliata (L.) Nieuwl. FACU Clasping‐Leaf Venus'‐Looking‐Glass
Tripleurospermum maritimum (L.) W.D.J. Koch FACU False Mayweed
Tripsacum dactyloides (L.) L. FAC Eastern Mock Grama
Trisetum cernuum Trin. FACU Tall False Oat
Trisetum orthochaetum A.S. Hitchc. FACW Bitterroot False Oat
Trisetum spicatum (L.) Richter FACU Narrow False Oat
Triteleia hyacinthina (Lindl.) Greene FAC Fool's‐Onion
Triteleia ixioides (Ait. f.) Greene FAC Prettyface
Triteleia peduncularis Lindl. FACW Long‐Ray Triplet‐Lily
Trollius laxus Salisb. OBL American Globeflower
Tsuga heterophylla (Raf.) Sarg. FACU Western Hemlock
Tsuga mertensiana (Bong.) Carr. FACU Mountain Hemlock
Tuctoria greenei (Vasey) J. Reeder OBL Awnless Spiral Grass
Tuctoria mucronata (Crampton) J. Reeder OBL Prickly Spiral Grass
Typha angustifolia L. OBL Narrow‐Leaf Cat‐Tail
Typha domingensis Pers. OBL Southern Cat‐Tail
Typha latifolia L. OBL Broad‐Leaf Cat‐Tail
Typha X glauca Godr. (pro sp.) OBL
Ulmus americana L. FAC American Elm
Ulmus rubra Muhl. FAC Slippery Elm
Umbellularia californica (Hook. & Arn.) Nutt. FAC California‐Laurel
Urochloa panicoides Beauv. FACU Panic Liverseed Grass
Urochloa platyphylla (Munro ex Wright) R. Webster FAC Broad‐Leaf Liverseed Grass
Urtica dioica L. FAC Stinging Nettle
Utricularia gibba L. OBL Humped Bladderwort
Utricularia intermedia Hayne OBL Flat‐Leaf Bladderwort
Utricularia macrorhiza Le Conte OBL Greater Bladderwort
Utricularia minor L. OBL Lesser Bladderwort
Utricularia ochroleuca R.W. Hartman OBL Dwarf Bladderwort
Utricularia subulata L. OBL Zigzag Bladderwort
Vaccaria hispanica (P. Mill.) Rauschert FACU Cowcockle
Vaccinium alaskaense T.J. Howell FAC Alaska Blueberry
Vaccinium caespitosum Michx. FAC Dwarf Blueberry
Vaccinium macrocarpon Ait. OBL Large Cranberry
Vaccinium membranaceum Dougl. ex Torr. FACU Square‐Twig Blueberry
Vaccinium myrtilloides Michx. FACU Velvet‐Leaf Blueberry
Vaccinium myrtillus L. FACU Whortle‐Berry
Vaccinium oxycoccos L. OBL Small Cranberry
Vaccinium parvifolium Sm. FAC Red Blueberry
Vaccinium scoparium Leib. ex Coville FACU Grouseberry
Vaccinium uliginosum L. FACW Alpine Blueberry
Vahlodea atropurpurea (Wahlenb.) Fries ex Hartman FACW Arctic‐Hair Grass
Valeriana acutiloba Rydb. FACU Cordilleran Valerian
Valeriana dioica L. FACW Marsh Valerian
Valeriana edulis Nutt. ex Torr. & Gray FAC Tobacco‐Root
Valeriana occidentalis Heller FAC Small‐Flower Valerian
Valeriana scouleri Rydb. FAC Scouler's Valerian
Valeriana sitchensis Bong. FAC Sitka Valerian
Valeriana texana Steyermark OBL Guadalupe Valerian
Valerianella amarella (Lindheimer ex Engelm.) Krok FACU Hairy Cornsalad
Vallisneria americana Michx. OBL American Eel‐Grass
Veratrum californicum Dur. FACW California False Hellebore
Veratrum fimbriatum Gray FACW Fringed False Hellebore
Veratrum viride Ait. FACW American False Hellebore
Verbascum thapsus L. FACU Great Mullein
Verbena bonariensis L. FACW Purple‐Top Vervain
Verbena bracteata Cav. ex Lag. & Rodr. FAC Carpet Vervain
Verbena californica Moldenke FACW Red Hills Vervain
Verbena carolina L. FAC Carolina Vervain
Verbena hastata L. FAC Simpler's‐Joy
Verbena lasiostachys Link FAC Western Vervain
Verbena macdougalii Heller FACU New Mexico Vervain
Verbena officinalis L. FACU Herb‐of‐the‐Cross
Verbena scabra Vahl OBL Sandpaper Vervain
Verbena urticifolia L. FAC White Vervain
Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray FACU Golden Crownbeard
Vernonia marginata (Torr.) Raf. FACU Plains Ironweed
Vernonia missurica Raf. FACW Missouri Ironweed
Vernonia noveboracensis (L.) Michx. FAC New York Ironweed
Veronica americana Schwein. ex Benth. OBL American‐Brooklime
Veronica anagallis‐aquatica L. OBL Blue Water Speedwell
Veronica arvensis L. FACU Corn Speedwell
Veronica beccabunga L. OBL European Speedwell
Veronica chamaedrys L. FACU Germander Speedwell
Veronica cusickii Gray FAC Cusick's Speedwell
Veronica peregrina L. OBL Neckweed
Veronica scutellata L. OBL Grass‐Leaf Speedwell
Veronica serpyllifolia L. FAC Thyme‐Leaf Speedwell
Veronica wormskjoldii Roemer & J.A. Schultes FACW American Alpine Speedwell
Vesicarpa potentilloides (Gray) Rydb. FAC False Chicken‐Sage
Viburnum edule (Michx.) Raf. FACW Squashberry
Viburnum lentago L. FAC Nanny‐Berry
Viburnum opulus L. FACW Highbush‐Cranberry
Viburnum rufidulum Raf. FACU Rusty Blackhaw
Vicia americana Muhl. ex Willd. FAC American Purple Vetch
Vicia nigricans Hook. & Arn. FACU Black Vetch
Vicia sativa L. FACU Garden Vetch
Viola adunca Sm. FAC Hook‐Spur Violet
Viola bicolor Pursh FAC Field Pansy
Viola canadensis L. FACU Canadian White Violet
Viola epipsila Ledeb. FACW Dwarf Marsh Violet
Viola glabella Nutt. FAC Pioneer Violet
Viola hallii Gray FAC Oregon Violet
Viola langsdorfii Fisch. ex Gingins FACW Aleutian Violet
Viola macloskeyi Lloyd OBL Smooth White Violet
Viola missouriensis Greene FACW Missouri Violet
Viola nephrophylla Greene FACW Northern Bog Violet
Viola palustris L. OBL Alpine‐Marsh Violet
Viola pedatifida G. Don FACU Crow‐Foot Violet
Viola renifolia Gray FACW Kidney‐Leaf White Violet
Viola septentrionalis Greene FACU Northern Woodland Violet
Viola sororia Willd. FAC Hooded Blue Violet
Viola X viarum Pollard FACU
Vitis aestivalis Michx. FACU Summer Grape
Vitis arizonica Engelm. FACU Canyon Grape
Vitis californica Benth. FACU California Grape
Vitis girdiana Munson FAC Valley Grape
Vitis labrusca L. FACU Fox Grape
Vitis riparia Michx. FAC River‐Bank Grape
Vitis rupestris Scheele FACU Rock Grape
Vulpia bromoides (L.) S.F. Gray FAC Brome Six‐Weeks Grass
Vulpia myuros (L.) K.C. Gmel. FACU Rat‐Tail Six‐Weeks Grass
Washingtonia filifera (L. Linden) H. Wendl. FACW California Fan Palm
Wislizenia refracta Engelm. FACU Spectacle‐Fruit
Wolffia arrhiza (L.) Horkel ex C.F.H. Wimmer OBL Spotless Watermeal
Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & OBL Northern Watermeal
Wolffia brasiliensis Weddell OBL Brazilian Watermeal
Wolffia columbiana Karst. OBL Columbian Watermeal
Wolffia globosa (Roxb.) den Hartog & Plas OBL Asian Watermeal
Wolffiella lingulata (Hegelm.) Hegelm. OBL Tongue‐Shape Bogmat
Wolffiella oblonga (Phil.) Hegelm. OBL Saber Bogmat
Woodwardia fimbriata Sm. FACW Giant Chain Fern
Woodwardia radicans (L.) J. Sm. OBL Rooting Chain Fern
Wyethia amplexicaulis (Nutt.) Nutt. FAC Northern Mule's‐Ears
Wyethia angustifolia (DC.) Nutt. FACU California‐Compassplant
Wyethia helianthoides Nutt. FACW White‐Ray Mule's‐Ears
X Elyhordeum macounii (Vasey) Barkworth & D.R. Dewey FACU
Xanthium spinosum L. FACU Spiny Cockleburr
Xanthium strumarium L. FAC Rough Cockleburr
Xanthocephalum gymnospermoide(Gray) Benth. & Hook. f. FAC San Pedro Matchweed
Xanthocyparis nootkatensis (D. Don) Farjon & D.K. Harder FAC Alaska‐Cedar
Yabea microcarpa (Hook. & Arn.) K.‐Pol. FACU False Hedge‐Parsley
Youngia japonica (L.) DC. FACU Oriental False Hawk's‐Beard
Zannichellia palustris L. OBL Horned‐Pondweed
Zantedeschia aethiopica (L.) Spreng. OBL Calla‐Lily
Zizania palustris L. OBL Northern Wild Rice
Zizia aptera (Gray) Fern. FAC Heart‐Leaf Alexanders
Zostera marina L. OBL Seawrack
Zoysia matrella (L.) Merr. FACU Manila Temple Grass