Summary
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Usnea is a genus of mostly pale grayish-green fruticose lichens that grow like leafless mini-shrubs or tassels anchored on bark or twigs.:203 The genus is in the family Parmeliaceae. It grows all over the world.
Sources and Credits
- (c) Arthur Chapman, some rights reserved (CC BY-NC-SA),
http://www.flickr.com/photos/32005048@N06/3259193345
- (c) Wikipedia, some rights reserved (CC BY-SA),
https://en.wikipedia.org/wiki/Usnea
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