Species
Usnea cornuta (Inflated beard)
Usnea cornuta. Photo: (c) p-drot, some rights reserved (CC BY-NC)
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.