Pinna
A single leaflet of a pinnately divided (feather-like) leaf. Botanists use this feature to describe leaf shape, surface, edge, or arrangement, which helps with plant identification.
Pinna
Purdue Arboretum Learning System
This glossary definition is part of the Purdue Arboretum learning resource database, providing educational information on campus flora, morphology, and botanical terminology.
Synonyms:
Pinnas, Pinnule, Pinnules
Categories:
Leaf morphology
