|
Imparipinnate
(odd pinnate) |
Paripinnate
(even pinnate) |
Of a featherlike
compound leaf that is divided
up into many small leaflets,
arranged in rows along either side of an
axis (midrib) called a rachis (pectinate) Each leaflet is known
as a pinna, and where the
pinnae are themselves divided, the
secondary divisions are known as
pinnules.
Imparipinnate (odd
pinnate): A pinnate leaf with a single terminal leaflet, and
therefore usually with an odd number of leaflets.
Paripinnate (even pinnate):
A pinnately compound leaf without a single terminal leaflet, and
therefore usually with an even number of leaflets. |