Tree and Leaf ID. 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. Tree Facts. Identify parts of a tree. Identify 2 main types of trees. Identify different characteristics of leaves. .
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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 Tree Facts
Identify parts of a tree. Identify 2 main types of trees. Identify different characteristics of leaves. Objectives
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? Why?
What are the parts of a tree? What are the 2 main types of trees? What are the different characteristics of leaves? What?
Crown – filters dusk, creates shade (cooling), food factory , releases oxygen
Heartwood – support the tree (xylem cells become inactive and die forming heartwood)
Cambium – thin layer of growing tissue b/w woody part and bark. Division of cells results in diameter growth.
Bark – dead phloem cells that protect the trees “armor for the tree”
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) 2 types of trees
Angiosperm- flowering plant Gymnosperm- non-flowering plant
Broadleaf Trees – known for their autumn color, bare branches in winter, and spring flowers, which can develop into fruit Needle leaf Trees – have needlelike or scale like leaves and plain flowers that develop into cones. Most are evergreens. Palms – with pandanus and lily trees, make up are group of mainly tropical trees. Most palms have huge leaves and no branches Trees are divided up into 3 groups
Long growing season Plentiful rainfall “Hardwood forest” EX: Ash, Aspen, Beech, Birch, Cottonwood, Elm, Hackberry, Live Oak, Maple, Myrtle, Oak, Sweet gum, Willow Broadleaf 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 Needle leaf Trees
Grow in warmer areas. Palms
Leaf arrangement Leaf Margins Leaf shape Leaf venation Leaf characteristics
Opposite Alternate Whorled Leaf Arrangement
Looking at the edge of the leaf • Serrated • Lobed • Smooth Leaf Margins
Palmate Linear Cordate Ovate Leaf shapes
The distribution or arrangement of a system of veins in a leaf. • Parallel • Palmate • Pinnate Leaf Venation
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 terms
What are the parts of a tree? What are the 2 main types of trees? What are the different characteristics of leaves? Review