Dolichousnea longissima

Methuselah's beard lichen
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Lecanorales
Family: Parmeliaceae
Genus: Dolichousnea
Species:
D. longissima
Binomial name
Dolichousnea longissima
(Ach.) Articus (2004)
Synonyms[1]
  • Parmelia coralloidea var. longissima (Ach.) Spreng. (1827)
  • Parmelia longissima (Ach.) Spreng. (1827)
  • Usnea barbata var. longissima (Ach.) Schaer. (1850)
  • Usnea longissima Ach. (1810)
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.

  1. ^ Cite error: The named reference Species Fungorum synonymy was invoked but never defined (see the help page).
  2. ^ Articus, K. (2004) Neuropogon and the phylogeny of Usnea s.l. (Parmeliaceae, lichenized Ascomycetes). Taxon 53(4): 925–934.
  3. ^ Esslinger, TL. (2018) A Cumulative Checklist for the Lichen-Forming, Lichenicolous and Allied Fungi of the Continental United States and Canada, Version 22. Opuscula Philolichenum 17: 6-268. http://sweetgum.nybg.org/science/op/biblio_details.php?irn=480859