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Trees need leaves primarily because of photosynthesis and respiration. Photosynthesis is the process by which carbon dioxide is converted into nutrients that are needed by plants for survival.


Professional forester and natural resource consultant Steve Nix describes scale-like leaves, needles and typical leaves with a leaf stalk, veins and a midrib in discussing how these leaves play a part in identifying trees. Nix explains that typical leaves usually come from hardwood and deciduous tre


You may identify a tree from its leaves by comparing its different attributes to listings in a database or guide of tree leaves. Tools needed to identify a leaf include a compilation of known tree attributes, which can be found online, in books or through different applications.


Common names of trees include oak, ash, maple, birch and pine. Among the oaks, there are red oaks, with leaves having pointed lobes, and white oaks, which have leaves with rounded leaf lobes. White oaks include the chinkapin oak, swamp chestnut oak and live oak. Red oak varieties are pin oak, cherry


Trees with red leaves include maple trees, purple-leaf plum trees, smoke trees and red-silver crabapples. Some trees have leaves that turn red in the fall, including sassafras and baldcypress trees.


A deciduous leaf's structure is divided into two categories, internal and external, with external structures including the blade, the petiole and the stipules and internal structures including the epidermis, the palisade layer, the spongy mesophyll, the vascular bundle, the stomata and the guard cel


Leaves fall from trees because the tree begins to prepare itself for the winter season. Trees seal the spots where the leaves are attached, cutting off water to the leaves. The leaves then change color and fall from the tree.


Some trees with huge leaves are the large-leaved cucumber tree, northern catalpa, banana tree and princesstree. The princesstree also has large leaves that grow up to 12 inches long and 8 inches wide, with trumpet-shaped flowers that are 2 1/2 inches long.


Trees and shrubs that lose their leaves are called deciduous trees. Deciduous plants have broad leaves that fall off when the plant goes into a dormant state, usually in the winter. Some plants are deciduous where there is a dry season.


Some examples of simple leaves include the sassafras, the white mulberry, the red mulberry and the paper mulberry. A leaf is simple if it has an undivided blade as opposed to the divided blade of a compound leaf. Simple leaves may be lobed, either balanced or unbalanced, or not lobed.