Leaf Definition & Meaning - Merriam-Webster
网页The meaning of LEAF is a lateral outgrowth from a plant stem that is typically a flattened expanded variably shaped greenish organ, constitutes a unit of the foliage, and functions primarily in food manufacture by photosynthesis.
Leaf | Definition, Parts, & Function | Britannica
网页Leaf, any usually flattened green outgrowth from the stem of a vascular plant. Leaves are the primary sites of photosynthesis and manufacture food for plants. They are an integral part of the stem system and can be modified into a variety of other plant organs.
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Leaf - Wikipedia
网页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 - Definition, Function and Types - Biology Dictionary
网页2017年8月19日 · Leaf Definition. The term leaf refers to the organ that forms the main lateral appendage on the stem of vascular plants. In general, leaves are thin, flat organs responsible for the photosynthesis of the plant.
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Plant Leaves and Leaf Anatomy - ThoughtCo
网页2019年11月4日 · Plant leaves are very important structures as they help to maintain life on earth by generating food (sugars) via photosynthesis. Leaves can have different shapes and sizes. The basic components of leaves in flowering plants (angiosperms) include the blade, the petiole, and the stipules.
Leaf Structure and Function | Harvard Forest - Harvard University
网页Leaf Structure and Function. For a typical leaf, we use that of the umbrella tree, which is commonly sold as a foliage plant throughout North America and Europe. It is actually a tree native to tropical rainforests of northern Australia; it is a good example because we can examine it at any time of the year. The structure of the umbrella tree ...
5.3: The Leaf - Biology LibreTexts
网页2024年5月18日 · General characters of leaf include stipules and other structures located near leaf base (Figure \(\PageIndex{6}\)): sheath (typical for grasses and other liliids) and ocrea (typical for buckwheat family, Polygonaceae).
Science of Leaves: Anatomy, Arrangement, & Adaptations
网页2023年7月12日 · Leaves grow from the stem of a plant and are typically green in color, and this is due to a chemical known as chlorophyll. Leaves serve a multitude of vital functions for plants, including the absorption of nutrients and water, as …
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