Letharia gracilis

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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: Letharia
Species: Letharia gracilis



Letharia gracilis Kroken ex McCune & Altermann, 2009

Distribution: Siskiyou Mountains (Del Norte and Siskiyou counties, California; Josephine Co., Oregon) and Sierra Nevada (Kennedy Meadows, Tuolumne County, CA).

Ecology and substrate: On bark or wood apparently uncommon in montane to subalpine forests.


  • McCune, B. and Altermann, S. (2009) Letharia gracilis (Parmeliaceae), a new species from California and Oregon. The Bryologist 112(2): 375–378.   (RLL List # 215 / Rec.# 31231 - Recent Literature on Lichens) (JSTOR)
  • Kroken, S. (1999) Cryptic Speciation and the Role of Sex in the Lichenized Fungus Letharia. Ph.D. thesis, University of California, Berkeley.
  • Kroken, S. and Taylor, J.W. (2001) A gene genealogical approach to recognize phylogenetic species boundaries in the lichenized fungus Letharia. Mycologia 93: 38–53.   (RLL List # 182 / Rec.# 21807 - Recent Literature on Lichens) (Web site)
  • Kroken, S. and Taylor, J.W. (2001) Outcrossing and recombination in the lichenized fungus Letharia. Fungal Genetics and Biology 34: 83–92.   (RLL List # 186 / Rec.# 22917 - Recent Literature on Lichens)

Vernacular names