Types of Leaves: Leaves can be classified into various types based on various criteria such as life span, the shape of the leaf blade and the role they perform in the plant body.
When a single lamina is connected to the main stem by a petiole, the leaf is said to be simple. A simple leaf may be incised to any depth but not down to the midrib or petiole. Eg., Guava leaves
A compound leaf is a leaf made up of two or more leaflets. In a compound leaf, the midrib of the leaf is branched into different leaflets and is connected by a single petiole. For eg., Pea, palm leaves.
The compound leaves are further sub-divided into the following types of leaves:
In a palmately compound leaf, the leaflets are attached at the tip of the petiole. Eg., Silk cotton. These can be differentiated into:
In a pinnately compound leaf, the midrib of the leaf is divided into numerous leaflets and all connected by a common axis. Eg., Neem. These can be further differentiated into:
It is the occurrence of more than one type of leaves on the same plant. It is of three types –
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