Consortium of
North American Lichen Herbaria
Login New Account
  • Home
  • Search
    • Specimen Search
    • Map Search
    • Exsiccati
    • 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
Rhizocarpon norvegicum Räsänen  
Go To Encyclopedia of Life...
Family: Rhizocarpaceae
Images
not available
  • American Arctic Lichens
  • Web Links
Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus areolate, the areolae dispersed or contiguous, to 0.7 mm broad, angular to roundish, usually very convex; yellow to bright yellow, dull or glossy; hypothallus black, present or only under the areolae. Apothecia to 0.7 mm broad, rounded-angular to round, slightly to strongly convex; margin thin, disappearing; exciple reddish brown, radiate; hypothecium brown; epithecium dark, with granules; hymenium 60-90 µm, hyaline or faintly reddish brown, upper part dark reddish brown; paraphyses capitate, tips dark; spores 8, 1-septate, dark, with halo, 9-15 x 6-7 µm.

Reactions: medulla K—, P—, or P+ yellow, 1+ dark blue; exciple K+ reddish violet; upper part of hymenium K— or K+ reddish violet.

Contents: rhizocarpic acid with or without psoromic acid.

This species grows on schists and slightly calcareous rocks. It is known from Scandinavia and the Alps in Europe, and from Greenland and Siberia, as well as from North America.

  • Encyclopedia of Life
  • Google Search Engine
  • Google Images
Rhizocarpon norvegicum
Open Interactive Map
Click to Display
0 Total Images

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