Arista

Arista (Synonym: Awn) [ Botany ]
(Plural: Aristae or Aristas)
Adjective: Aristate

Dictionary of botanic terminology - index of names

An arista is a stiff bristle-like part or structure from the apex of a plant organ, such as the beard (awn) found on the spikelets of barley, oats, and grasses or any similar bristlelike appendage.

From Latin "arista" , “ear of grain”

For example: an aristate leaf is a leaf which terminates in a stiff, bristle-like tip

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