- any pale-green or gray, mosslike lichen of the genus Usnea, common on rocks and trees.
Origin of usnea
1590–1600; < New Latin, Medieval Latin < Arabic or Persian ushnah
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for usnea
The larger ones covered with lichens,—often hung with the long gray Usnea.Cape Cod
Henry D. Thoreau
It was in a section of Mississippi where there was no Usnea growing within 60 miles.
The Indian said that the usnea lichen which we saw hanging from the trees was called chorchorque.The Maine Woods
Henry David Thoreau
Usnea barbata is collected from trees in Pennsylvania, and used for an orange colour for yarn.Vegetable Dyes
Ethel M. Mairet