Kinds of Leaves - QS Study
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Leaves are the power-stations of any plant or tree. Take a mango leaf and a tamarind leaf to observe them. You will see that the lamina in the mango leaf is not lobed while the lamina in the tamarind has more than one leaflets. On the basis of the characteristic of leaf blades, leaves can be divided into two groups-

(i) Simple leaf and

(ii) Compound leaf.

Simple leaf: A Simple leaf contains only leaflet. Leaves of mango and Jack fruit trees are simple leafs. The edge of a simple leaf is either totally unbroken or moderately incised. A simple leaf has a single blade. A simple leaf may have incisions but these incisions are not deep enough to divide the blade into leaflets (one of the subdivisions of a compound leaf).

Compound leaf: The blades of compound leaves are divided into distinct parts called leaflets. Observe the leaves of rose, neem, tamarind and moringa (sajna) plants. You will see that each of these leafs has many small laminae. These are leaflets. The lamina of a compound leaf is completely divided and the divided pans make the leaflets which are separated from one another. The branch like structure bearing the leaflets is called the rachis or axis. There are different types of pinnate compound leafs. According to the arrangement of the leaflets, compound leafs are of two kinds- Pinnate compound leaf and Palmate compound leaf.