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This is a list of species in the fruticose lichen genus Usnea, commonly known as "beard lichens". As of March 2025, Species Fungorum (in the Catalogue of Life) accepts 128 species of Usnea, although many more have been described throughout the genus's extensive taxonomic history. The fungal nomenclatural authority Index Fungorum lists nearly 2,000 taxa that have ever been associated with the ...
Growing on a conifer in the hills north of Mount St. Helens, showing the leaf-like side-branches and pendent "stems", some of them several metres long. Dolichousnea longissima (syn. Usnea longissima), [2] [3] commonly known by the names old man's beard or Methuselah's beard lichen, is a fruticose lichen in the family Parmeliaceae.
Usnea is a genus of fruticose lichens in the large family Parmeliaceae.The genus, which currently contains roughly 130 species, was established by Michel Adanson in 1763. . Species in the genus grow like leafless mini-shrubs or tassels anchored on bark or
Usnea hirta is a species of beard lichen in the family Parmeliaceae. It was one of 80 lichen species first formally described by Carl Linnaeus in his 1753 work Species Plantarum . Friedrich Heinrich Wiggers transferred it to the genus Usnea in 1780. [ 2 ]
Usnea strigosa has worldwide distribution. It is a common tree lichen in Eastern and Southeastern North America. It is a common tree lichen in Eastern and Southeastern North America. [ 1 ] [ 2 ]
Usnea trichodea, commonly known as bony beard lichen, [1] is a pale straw-colored fruticose lichen with a pendant growth form. It grows on trees and is native to eastern North America. It grows on trees and is native to eastern North America.
Usnea articulata, commonly known as the string-of-sausage lichen, [1] is a pale greenish-grey, densely branched lichen with a prostrate or pendant growth form. It grows on bark, on branches and twigs, and is often unattached to a branch and merely draped over it. It grows up to 100 cm (40 in) in length. [1]
Usnea sphacelata is a species of saxicolous (rock-dwelling), fruticose lichen in the large family Parmeliaceae. It is found in both polar regions of Earth , as well as in southern and northern South America and in New Zealand.