Petiole

Definition of Petiole

Part of the leaf that is attached to the plant stem or branches
Example: Leaves of Rose, Violet, Sunflower, Basal.

The petiole gets its name from “little foot’
It is also referred to as ‘leaf stalk’
Modified petioles are known as ‘phyllodes’
Petioles attach the leaf blade to the stem
It directs the leaf from the branch to gets sufficient sunlight for photosynthesis
The structure and length of the petiole may differ from plant to plant
Small outgrowths appearing on either side of petiole are called ‘stipules’
Any change in the petiole is detected, it shows the sign of disease or infection of the plant
Leaves may or may not be bear petioles
The number of Petiole is important characteristics for the plant classification.
If all the Petiole are similar in the size and shape, the flower is known as regular or actinomorphic flower.
If the flowers are symmetrical in only one plane, then they are said to be irregular or zygomorphic.
In some plants the sepals and the Petiole of the flowers cannot be distinguished as they have the same colour and shape. For example Tulips.
Such flowers are known to have tepals, instead of sepals and Petiole.
The leaves that have petiole are called as ‘Petiolate leaves’, whereas the ones lacking petiole are termed as ‘Sessile leaves’
Leaves of Hibiscus and rose plant are petiolate leaves

1) The leaf that do not bear petiole are known as ____ leaf.

Solution: (b) The leaf without petiole is known as sessile leaf

2) Which among the following plant examples have petiolate leaves?

Solution: (b) Rose plant has petiolate leaves, whereas grass has sessile leaves