Tree and Leaf ID
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Transcript of Tree and Leaf ID
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TREE AND LEAF ID
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TREE FACTS
Only 10% of virgin forest left in US
Arkansas originally had 33.6 million
acres of forest now 17.25 acres.
Arkansas’ first national forest est. 1909
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OBJECTIVES Identify parts of a tree.
Identify 2 main types of trees.
Identify different characteristics of leaves.
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WHY? Why do we need to know the parts of a
tree?
Why is it important to be able to know the different types of trees?
Why do we need to know the different characteristics of leaves?
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WHAT? What are the parts of a tree?
What are the 2 main types of trees?
What are the different characteristics of leaves?
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PARTS OF THE TREE
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CROWN – FILTERS DUSK, CREATES SHADE (COOLING), FOOD FACTORY , RELEASES OXYGEN
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ROOTS – ABSORB/STORES WATER AND NUTRIENTS, ANCHORAGE
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TRUNK/STEM – SUPPORTS CROWN, AND GIVES TREE STRENGTH AND SUPPORT
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HEARTWOOD – SUPPORT THE TREE (XYLEM CELLS BECOME INACTIVE AND DIE FORMING HEARTWOOD)
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XYLEM/SAPWOOD – TISSUE THAT CARRIES WATER UP THE PLANT
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CAMBIUM – THIN LAYER OF GROWING TISSUE B/W WOODY PART AND BARK. DIVISION OF CELLS RESULTS IN DIAMETER GROWTH.
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PHLOEM (PART OF THE BARK) – CARRIES SAP FROM LEAVES TO REST OF TREE
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BARK – DEAD PHLOEM CELLS THAT PROTECT THE TREES “ARMOR FOR THE TREE”
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2 TYPES OF TREES Coniferous- type of tree that does lose
its leaves at different time of the year. (angiosperm)
Deciduous- type of tree will not lose its leaves or needles in the winter (gymnosperm)
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Angiosperm- flowering plant
Gymnosperm- non-flowering plant
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TREES ARE DIVIDED UP INTO 3 GROUPS 1. Broadleaf Trees – known for their autumn
color, bare branches in winter, and spring flowers, which can develop into fruit
2. Needle leaf Trees – have needlelike or scale like leaves and plain flowers that develop into cones. Most are evergreens.
3. Palms – with pandanus and lily trees, make up are group of mainly tropical trees. Most palms have huge leaves and no branches
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BROADLEAF TREES Long growing season Plentiful rainfall “Hardwood forest” EX: Ash, Aspen, Beech, Birch,
Cottonwood, Elm, Hackberry, Live Oak, Maple, Myrtle, Oak, Sweet gum, Willow
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BROADLEAF TREES
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NEEDLE LEAF TREES Grow where there are long, cold winters Some needleleaf forests grow in
warmer areas = Southeastern U.S. “Softwood forests” EX: Pine, Cedar, Fir, Cypress, Juniper,
Spruce, Redwood
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NEEDLE LEAF TREES
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PALMS Grow in warmer areas.
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LEAF CHARACTERISTICS
Leaf arrangement
Leaf Margins
Leaf shape
Leaf venation
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LEAF ARRANGEMENT
Opposite
Alternate
Whorled
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LEAF MARGINS Looking at the edge of the leaf
Serrated
Lobed
Smooth
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LEAF SHAPES
Palmate
Linear
Cordate
Ovate
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LEAF VENATION The distribution or arrangement of a
system of veins in a leaf. Parallel
Palmate
Pinnate
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TERMS Blade/leaf- main photosynthesis organ of
most plants. Virgin forest- untouched forest usually old
growth Snag- standing dead trees Duff- blanket of twigs and needles left
after cutting Slash- limbs, treetops, and other waste
left after cutting
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REVIEW What are the parts of a tree?
What are the 2 main types of trees?
What are the different characteristics of leaves?