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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 twigs.
Usnea florida is a species of beard lichen in the family Parmeliaceae. It was first described by Carl Linnaeus in his 1753 work Species Plantarum . German botanist Friedrich Heinrich Wiggers transferred it to the genus Usnea in 1780.
Usnea barbata f. ceratina Ach. [3] Usnea barbata f. florida Fr. [3] Usnea barbata var. articulata Ach. [3] Usnea barbata var. australis Müll.Arg. [3] Usnea barbata var. farinosa Müll.Arg. [3] Usnea barbata var. florida f. australis Vain. [3] Usnea barbata* Usnea florida var. comosa Wain. [3] Usnea barbata var. scabrosa Müll.Arg. [3] Usnea ...
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.
The compound was first isolated in 1880 from the lichen Usnea barbata by chemists John Stenhouse and Charles Groves. [1] [2] [3] The compound coccellic acid, isolated from Cladonia coccifera, was later shown to be the same compound as barbatic acid. [4]
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 ]
The Parmeliaceae is a large and diverse family of Lecanoromycetes.With over 2700 species [2] in 71 genera, it is the largest family of lichen-forming fungi.The most speciose genera in the family are the well-known groups: Xanthoparmelia (822 species), Usnea (355 species), Parmotrema (255 species), and Hypotrachyna (262 species).
Usnea glabrescens is a species of beard lichen in the family Parmeliaceae. It grows on bark , has a shrubby thallus with a blackened base, and a thick cortex . Several chemotypes of this species have been reported.