Definition of a tree
woody plant with an erect perennial trunk at least 3 inches in diameter
and a total height of at least 13 feet at maturity with a definitely formed crown of foliage.
Tree shapes:
Pyramidal, conical, columnar, spreading, vase-shaped, broad, rounded.
Can be needle-shaped, scale-shaped, or broad and flat.
Broad leaves
Simple or compound.
Arranged in an opposite, alternate, or whorled pattern.
Leaf shapes:
Linear (grass-shaped), Lanceolate (lance-shaped), Oblanceolate(Reverse lance shaped), Round, Ovate (egg shaped), Obovate (Reverse egg shaped), oblong, Elliptical (oval), Spatulate (spoon-shaped)
Edges of leaves:
Without teeth or toothed. Can be wavy, turned under, or deeply divided into parts or lobes.
Contain sepals, petals, and stamens or pistals.
Usually green and leaf-like
Brightly colored
Male reproductive system
Female reproductive system
Gender of flowers?
Most are bisexual, but some are only one sex. The two sexes can appear on separate trees or on different locations of the same tree.
leaves can be needle-shaped, scale-shaped, or broad and flat.
Simple fruit can be:
Dry or fleshy. If it develops from several pistols, it is an aggregate.
Northern forests
spruces, firs, pines, tamarack, paper birch, quaking aspen
Pacific coast forest
hemlock, redwood, Douglas fir, western red cedar
Western Mountain Forests
ponderosa pine, lodgepole pine, Engleman spruce, Douglas fir.
Northeastern Deciduous Forests
eastern hemlock, American beech, red oak, basswood, sugar maple beech, maples
Central Forests
tuliptree, sycamore, shagbark hickory, white oak, Ohio buckeye
Southeastern Forest
Loblolly pine, shortleaf pine, longleaf pine, mockernut hickory,
live oak.
Subtropical Forest
red mangrove, black mangrove, cabbage palmetto
Unforested area climate
desert, grassland, tundra
*Tree Growth Requirements
trees belonging to the same group or family may have different growth requirements as temperature, moisture, and soil types. Some grow in pure
stands but many grow in association with other species of trees.
*Environmental Impact of trees
their role in the stability of their ecosystems.
Things they provide and problems created by misuse and natural factors as forest fires.
*Interspecies Relationship
relationship with other trees and plants and the animals within their ecosystem. Some animals are very specific about the type of tree
they require within their ecosystem.
*Role within their ecosystems
Place within the food chains and food webs of their ecosystems.