BOT 155 FIELD BOTANY

Trees

Herbs (Wild Flowers)

Vines

Shrubs

Enlightenment !!

A plant with a weak stem that derives support from climbing, twining, or creeping along a surface

A plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

A woody plant smaller than a tree, and usually with several stems from the same base

A tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms

Herb or Wildflower

Vine

Shrub

Tree

Organs• Stems • Leaves &

Reproductive

Structures

• Roots

Trees and Shrubs

Roots

Trunk (Main Stem)

Crown (Lateral Branches + Leaves + Reproductive Units)

Leaves

• All leaves originate as primordia at the apex of a stem

Variation in Leaves

• Number of leaflets

• Venation

• Pattern of attachment on stem

Leaves

• At maturity, most leaves have a stalk (petiole) and a flattened blade (lamina) with a network of veins (vascular bundles).

Leaves

• Simple (single blade) • Compound (divided

into leaflets).– Palmately compound

leaflets attached at the same point at end of petiole

– Pinnately compound leaflets in pairs along the rachis

– Bipinnately compound leaflets subdivided further

Notice location of axillary bud

Simple Compound

Narrowly PointedBroadly Pointed

Broadly Pointed

Bristle tipped

Square

Rounded

Narrowly Pointed Rounded

EntireUndulate(Wavy)

Finely Serrate Finely Serrate

Coursely Serrate

Coursely Serrate

Doubly Toothed

Pinnately Lobed Pinnately Lobed

Pinnately Lobed Palmately Lobed

Finely SerrateEntire

NarrowlyWedge-shaped

BroadlyWedge-shaped

BroadlyWedge-shaped

Square Heart-shaped Oblique

Rounded

Linear

Oval

Ovate Obovate

Lance-shaped

Heart-shaped Deltoid(Triangular)

Elliptical

Oblong

LinearLinear

Needle-like

Scale-like

Scale-like

Awl-like