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A leaf (pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", [2][3] while the leaves, stem, flower, and fruit collectively form the shoot system. [4]
leaf base. Triangular, wedge-shaped, stem attaches to point. cuneiform. whole leaf. Narrowly triangular, widest on the opposite end from the stem, with the corners at that end rounded. cuspidate. cuspidatus. leaf tip. With a sharp, elongated, rigid tip; tipped with a cusp.
Surface of an organ facing away from the organ's axis, e.g. the lower surface of a lateral organ such as a leaf or petal. [2] Contrast adaxial. abort. To abandon development of a structure or organ. [3] abscission. Natural shedding of an organ that is mature or aged, as of a ripe fruit or an old leaf.
In computer science, a tree is a widely used abstract data type that represents a hierarchical tree structure with a set of connected nodes. Each node in the tree can be connected to many children (depending on the type of tree), but must be connected to exactly one parent, [1] except for the root node, which has no parent (i.e., the root node ...
Rosette – cluster of leaves with very short internodes that are crowded together, normally on the surface of the soil but sometimes higher on the stem. Rostellate – like a rosette (cf. rostellum). Rosulate – arranged into a rosette. Runner – an elongated, slender branch that roots at the nodes or tip.
Definitions vary, some referring to length and others to area. Raunkiaer's original definitions were by leaf area, and differed by a factor of nine at each stage. [2] Some authors simplified the system to make it specific to particular climates, [3] and have introduced extra terms including notophyll, [3] picophyll, [4] platyphyll [4] and ...
Specific leaf area is a ratio indicating how much leaf area a plant builds with a given amount of leaf biomass: where A is the area of a given leaf or all leaves of a plant, and M L is the dry mass of those leaves. Typical units are m 2 /kg or mm 2 /mg. Leaf mass per area (LMA) is its inverse and can mathematically be decomposed in two ...
A cotyledon (/ ˌkɒtɪˈliːdən /; from Latin cotyledon; [1] from κοτυληδών (kotulēdṓn) "a cavity, small cup, any cup-shaped hollow", [2] gen. κοτυληδόνος (kotulēdónos), from κοτύλη (kotýlē) 'cup, bowl') is a "seed leaf" - a significant part of the embryo within the seed of a plant, and is formally defined as ...