A leaflet (occasionally called foliole) in botany is a leaf-like part of a compound leaf.
[2] Compound leaves are common in many plant families and they differ widely in morphology.
[3] The two main classes of compound leaf morphology are palmate and pinnate.
The ultimate free division (or leaflet) of a compound leaf, or a pinnate subdivision of a multipinnate leaf is called a pinnule or pinnula.
This plant morphology article is a stub.