Usnea

[ʌsniә]

Definition

(noun.) widely distributed lichens usually having a greyish or yellow pendulous freely branched thallus.

Typed by Lloyd--From WordNet

Definition

(n.) A genus of lichens, most of the species of which have long, gray, pendulous, and finely branched fronds. Usnea barbata is the common bearded lichen which grows on branches of trees in northern forests.

Checked by Brett