Consortium of
North American Lichen Herbaria
- building a Global Consortium of Bryophytes and Lichens as keystones of cryptobiotic communities -
Login New Account
  • Home
  • Search
    • Specimen Search
    • Map Search
    • Exsiccatae
    • Dynamic Species List
    • Dynamic Identification Key
    • Taxonomic Explorer
  • Images
    • Image Browser
    • Image Search
  • Species Checklists
    • North America
    • Canada
    • US States: A-L >
      • Alaska
      • Arizona
      • Arkansas
      • California
      • Colorado
      • Florida
      • Georgia
      • Hawai'i
      • Idaho
      • Illinois
      • Indiana
      • Iowa
      • Kansas
      • Kentucky
    • US States: M-Q >
      • Maine
      • Maryland
      • Massachusetts
      • Michigan
      • Missouri
      • Montana
      • Minnesota
      • Mississippi
      • Nebraska
      • Nevada
      • New Jersey
      • New Mexico
      • New York
      • North Carolina
      • North Dakota
      • Ohio
      • Oklahoma
      • Oregon
      • Pennsylvania
    • US States: S-Z >
      • South Carolina
      • South Dakota
      • Tennessee
      • Texas
      • Utah
      • Virginia
      • Washington, D.C.
      • Washington
      • West Virginia
      • Wisconsin
      • Wyoming
    • US National Parks
    • Southern Subpolar Region
  • Crowdsourcing
  • Associated Projects
    • Arctic Lichens
    • Bryophyte Portal (CNABH)
    • Líquenes en América Latina (CHLAL)
    • MyCoPortal
  • More Information
    • Symbiota Help
    • Partners
    • About
    • Data Usage Policy
    • Links
  • Sitemap
  • Help & Resources
Usnea strigosa (Ach.) Eaton  
Go To Encyclopedia of Life...
Family: Parmeliaceae
[Usnea florida var. strigosa Ach.]
Usnea strigosa image
Stephen Sharnoff  
  • Greater Sonoran Desert
  • Web Links
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
Thallus: erect-shrubby, 2 to 5 cm long branching: anisotomic dichotomous, divergent basal part: concolorous with the branches, not distinctly annulate branches: cylindrical to tapering, not distinctly segmented; lateral branches: not narrowed at attachment points segments: terete to distinctly ridged, cylindrical tubercles: absent fibercles: absent to few fibrils: short (1-2 mm), conspicuous, spinulous, not easily broken away, usually densely and regularly disposed all along the branches, giving a spinulous appearance to the whole thallus isidiomorphs: absent cortex: shiny, not distinctly cracked, moderately thick (5-7%) medulla: dense to compact, not pigmented axis: moderately thick, not pigmented Apothecia: numerous, up to 5 mm in diam., mainly terminal ascospores: broadly ellipsoid, 9-10 x 5-6 µm Spot tests: medulla K-, C-, KC-, P- Secondary metabolite: diffractaic (major). Substrate and ecology: on bark in thorn forest with Acacia, Lysiloma and Jatropha. World distribution: mainly eastern and southeastern North America, rare in Mexico Sonoran distribution: southern Baja California. Notes: Usnea strigosa has many different chemotypes and needs a modern and thorough revision of its taxonomy. It is characterized by its tufted habit with numerous terminal apothecia, its densely and regularly disposed fibrils that are short and spinulose, its ridged branches that are not narrowed at the point of attachment, the absence of papillae and its basal part that is not black pigmented. All the Mexican specimens studied have an unpigmented medulla. This diffractaic acid chemotype is so far the only chemotype that has been found in Mexico. Usnea parvula is morphologically very close to U. strigosa but the former species has shorter spores, a thinner cortex, typical foveoles, as well as a lax medulla without diffractaic acid.
  • Encyclopedia of Life
  • Google Search Engine
  • Google Images
Usnea strigosa
Open Interactive Map
Usnea strigosa image
Samuel Brinker  
Usnea strigosa image
Usnea strigosa image
Troy McMullin  
Usnea strigosa image
Sheila Strawn  
Usnea strigosa image
Sheila Strawn  
Usnea strigosa image
Sheila Strawn  
Usnea strigosa image
Gary Perlmutter  
Usnea strigosa image
Gary Perlmutter  
Usnea strigosa image
Stephen Sharnoff  
Usnea strigosa image
Stephen Sharnoff  
Usnea strigosa image
Stephen Sharnoff  
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Usnea strigosa image
Click to Display
100 Initial Images
- - - - -
View All Images

This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394