Structure of leaf and vanatation system
Answers
A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem.[1] The leaves and stem together form the shoot.[2] Leaves are collectively referred to as foliage, as in "autumn foliage".[3][4]
Diagram of a simple leaf.
ApexMidvein (Primary vein)Secondary vein.Lamina.Leaf marginPetioleBudStem
Top and Right: Staghorn Sumac, Rhus typhina (Compound Leaf)
Bottom: Skunk Cabbage, Symplocarpus foetidus (Simple Leaf)
1. Apex
2. Primary Vein
3. Secondary Vein
4. Lamina
5. Leaf Margin
6. Petiole
A leaf is a thin, dorsiventrally flattened organ, usually borne above ground and specialized for photosynthesis. In most leaves, the primary photosynthetic tissue, the palisade mesophyll, is located on the upper side of the blade or lamina of the leaf[1] but in some species, including the mature foliage of Eucalyptus,[5] palisade mesophyll is present on both sides and the leaves are said to be isobilateral. Most leaves have distinct upper surface (adaxial) and lower surface (abaxial) that differ in colour, hairiness, the number of stomata (pores that intake and output gases), the amount and structure of epicuticular wax and other features.