In tree: The anatomy and organization of wood …with smaller lateral branches (excurrent branching). Many angiosperms show for some part of their development a well-defined central axis, which then divides continually to form a crown of branches of similar dimensions (deliquescent branching).
A "decurrent branching habit" is a plant form common for shrubs and most angiosperm trees, contrasted with the excurrent or "cone-shaped crown" common among many gymnosperms. The decurrent habit is characterized by having weak apical dominance that eventually produces a rounded or spreading tree crown.
Define excurrent. excurrent synonyms, excurrent pronunciation, excurrent translation, English dictionary definition of excurrent. excurrent red spruce adj. 1. a. Running or flowing outward. ... the aerial parts of tree species respectively as excurrent crown and decurrent crown for Common Cypresses and old Rubber trees .
Examples of excurrent trees include most conebearing evergreens, some oaks such as pin oak and willow oak, tulip poplar, sweet gum, and southern magnolia. A decurrent tree has a weak central leader, which allows lateral branches to grow as quickly as the terminal shoot on the leader.
Decurrent Tree Form: Tree form which develops when the lateral branches grow as fast, or faster, than the terminal shot. This results in a tree with a broad, spreading form and multiple trunks. Excurrent Tree Form: Tree form which develops when the leader outgrows the lateral branches.
The crown of a woody plant (tree, shrub, liana) is the branches, leaves, and reproductive structures extending from the trunk or main stems. Shapes of crowns are highly variable. The major types for trees are the excurrent branching habit resulting in conoid shapes and decurrent (deliquescent) branching habit, resulting in round shapes. Crowns ...
Most forest trees of the temperate zone can be classified as either excurrent or decurrent (deliquescent), depending on differences in the rates of elongation of buds and branches. In gymnosperms such as pines, spruces, and firs, the terminal leader elongates more each year than the lateral branches below it, producing a single central stem and the conical crown of the excurrent tree.
Excurrent definition, running out or forth. See more.
Tree - Tree structure and growth: In the section Ecological and evolutionary classification, it is pointed out that land plants are descended from aquatic plants. The early aquatic plants required few modifications for structural support or water and nutrient absorption, since the surrounding water fulfilled their needs. The water, far denser than the air, buoyed the plant body; the thin ...
Tree Growth Characteristics Jennifer Franklin, Associate Professor David Mercker, Extension Specialist Forestry, Wildlife and Fisheries after another in a spiral pattern, so are found on all sides of the stem as in Southern magnolia (Magnolia grandiflora). Opposite leaves are typically produced two at each node, on opposite sides of the meristem.