The leaf is attached to the stem by the leaf base and may bear two lateral small leaf like structures called petiolesphotosynthesispulvinusstipules.

In some leguminous plants the leaf base may become swollen, which is called the petiolesphotosynthesispulvinusstipules.

Long thin flexible petiolesphotosynthesispulvinusstipules allow leaf blades to flutter in wind, thereby cooling the leaf and bringing fresh air to leaf surface.

Leaves are the most important vegetative organs for petiolesphotosynthesispulvinusstipules.