Usnea scabrata

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Taxonavigation: Lecanorales 

Superregnum: Eukaryota
Regnum: Fungi
Subregnum: Dikarya
Divisio: Ascomycota
Subdivisio: Pezizomycotina
Classis: Lecanoromycetes
Subclassis: Lecanoromycetidae
Ordo: Lecanorales

Familia: Parmeliaceae
Subfamilia: Parmelioideae
Genus: Usnea
Species: Usnea scabrata


Usnea scabrata Nyl., 1875

Substrate and ecology: On bark (especially Quercus spp. and shrubs) in coastal chaparral or oak-pine woodlands at 200 and 400 m in the mountains.   (Source: Clerc, 2007)



  • Nyl., Flora 58: 103 (1875)
  • Brodo, I.M., Sharnoff, S.D. and Sharnoff, S. (2001) Usnea (pp. 709-726) In, Lichens of North America. Yale University Press, New Haven, 795 pages. (Description of U. scabrata, and distribution map for North America: p. 724; color photo: p. 724, plate 892)
  • Clerc, P. (2007) Usnea (pp. 302-335) In: Nash III, T.H., Gries, C., and Bungartz, F. (eds.), Lichen Flora of the Greater Sonoran Desert Region, Vol. 3. Lichens Unlimited, Arizona State University, Tempe, Arizona, 567 pages.   (RLL List # 210 / Rec.# 29910 - Recent Literature on Lichens) (PDF file) (Description of U. scabrata, and distribution map for the Sonoran Desert Region: p. 329)
  • Halonen, P., Clerc, P., Goward, T., Brodo, I.M. and Wulff, K. (1998) Synopsis of the genus Usnea (lichenized Ascomycetes) in British Columbia, Canada. The Bryologist 101(1): 36–60.   (RLL List # 170 / Rec.# 7545 - Recent Literature on Lichens) (PDF file) (JSTOR) (Description of U. scabrata: pp. 55-56; black-and-white photo: p. 39, fig. 7, sinuose terminal branches)
  • Herrera-Campos, M.A., Clerc, P. and Nash III, T.H. (1998) Pendulous species of Usnea from temperate forests in Mexico. The Bryologist 101(2): 303–329.   (RLL List # 171 / Rec.# 8393 - Recent Literature on Lichens) (JSTOR) (Description of U. scabrata: p. 325; black-and-white photo of segments of main branch: p. 307, fig 5f; black-and-white photo of longitudinal section of branch: p. 312, fig. 10b; distribution map for Mexico: p. 314, fig 12b)
  • Thomson, J.W. (1984) Usnea (pp. 461-470). In, American Arctic Lichens: 1. The Macrolichens. Columbia University Press, New York, 504 pages. (Description of Usnea scabrata Nyl. subsp. nylanderiana Mot.: pp. 467-468)
  • Wirth, V. (1995) Usnea (pp. 940-953 - Teil 2) In, Die Flechten Baden-Württembergs, Teil 1 & 2. Eugen Ulmer GmbH & Co., Stuttgart. 1006 pp.; in German. (Description of U. scabrata: p. 952)

Links to photos[edit]

Vernacular name[edit]

English: Straw beard lichen,   Beard lichen