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Peduncle

A peduncle is the stalk of an inflorescence.  For composite family (Asteraceae) species, a peduncle is the stalk of a flower head.

A flower head is a type of a compact inflorescence.

 

Figure A.  Illustration of peduncle of garlic mustard.
(Alliaria petiolata)

 

Figure B.  Illustration of peduncle of flower head of
robin's plantain  (Erigeron pulchellus).

 

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