Usnea
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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 li
Usnea cavernosa Flickr pellaea
Usnea, as depicted in Dillenius's 1768 work Historia muscorum
Usnea dasopoga
Usnea angulata has ridged branches.
Dolichousnea longissima
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Dolichousnea longissima, commonly known by the names old man's beard or Methuselah's beard lichen, is a fruticose lichen in the family Parmeliaceae.
Usnea
…yellow-green, grey-green, reddish, or variegated, and range in size from a few millimetres in polluted areas to over three metres long in species like Usnea longissima. Members of the genus are similar to those of the genus Alectoria. A distinguishing test is that the branches of Usnea are somewhat elastic, but the…
Lichen Dolichousnea longissima IMG 4844
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