Arista

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arista

[ə′ris·tə]
(invertebrate zoology)
The bristlelike or hairlike structure in many organisms, especially at or near the tip of the antenna of many Diptera.

Arista

 

in plants, the thin, pointed, sometimes thorny or feathery process on the apex or back of an inferior flowering glume or, less frequently, of the glume of many cereals. An arista may be straight, bent, or spirally twisted (in Stipa and Avena). It plays an important role in the dissemination of cereal grains by the wind or animals.