The following points highlight the three main parts of a leaf. The parts are: 1. The Leaf-Base 2. The Petiole 3. The Lamina. Part # 1. The Leaf-Base: It is by no means a conspicuous part of the leaf. Some leaves like those of the pea, sensitive plant, mango have swollen leaf-bases. Such a leaf- base is called pulvinus (Fig. [...]
In this article we will discuss about the structure of leafs with the help of diagrams. Dorsiventral Leaf: Leaves having two surfaces, dorsal and ventral, are called dorsiventral. The upper surface of these leaves is directly illuminated by the sun's rays. (Fig. 156) A thin section of such a leaf would show the following structure: I. Epidermis: There are two [...]
In this article we will discuss about:- 1. Meaning of Leaf 2. Functions of the Leaf 3. Simple and Compound Leaves 4. Phyllotaxy 5. Kinds 6. Modifications. Meaning of Leaf: The leaves are the most conspicuous vegetative organs of the plants. They are lateral dissimilar outgrowths or appendages of the stems or branches. Leaves are usually green, flat, expanded organs [...]