Consortium of 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
    • Global Checklists >
      • Global Checklists of Lichens & Lichenicolous Fungi
      • Global IUCN Red-Lists
    • Arctic
    • North America
    • Canada
    • Mexico
    • US States: A-L >
      • Alaska
      • Arizona
      • Arkansas
      • California
      • Colorado
      • Florida
      • Georgia
      • Hawai'i
      • Idaho
      • Illinois
      • Indiana
      • Iowa
      • Kansas
      • Kentucky
    • US States: M-N >
      • Maine
      • Maryland
      • Massachusetts
      • Michigan
      • Missouri
      • Minnesota
      • Mississippi
      • Montana
      • Nebraska
      • Nevada
      • New Jersey
      • New Mexico
      • New York
      • North Carolina
      • North Dakota
    • US States: O-Z >
      • Ohio
      • Oklahoma
      • Oregon
      • Pennsylvania
      • South Carolina
      • South Dakota
      • Tennessee
      • Texas
      • Utah
      • Virginia
      • Washington, D.C.
      • Washington
      • West Virginia
      • Wisconsin
      • Wyoming
    • US National Parks
    • Central America
      • Panama
    • South America
      • Ecuador
    • US National Parks
    • Southern Subpolar Region
  • Crowdsourcing
  • Associated Projects
    • Consortium of Bryophyte Herbaria
    • GLOBAL Bryophytes and Lichens Network
    • MyCoPortal
  • More Information
    • Partners
    • Data Usage Policy
  • Sitemap
  • Help & Resources
    • Consortium Resources
    • Symbiota Help
Myelochroa
Family: Parmeliaceae
Myelochroa image
Samuel Brinker
  • Greater Sonoran Desert
  • Resources
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2002. Lichen Flora of the Greater Sonoran Desert Region. Vol 1.
Life habit: lichenized Thallus: foliose, ± circular, 5-10 cm diam., loosely adnate to adnate, subdichotomously to irregularly lobate lobes: usually subirregular, sometimes sublinear, 1-4 mm wide, lobe tips subrotund to rotund, ciliate; cilia: simple, in axils of lobes upper surface: gray, sometimes with a yellowish tinge or pale greenish white, emaculate or with simple maculae; with or without soredia or isidia; pseudocyphellae: absent upper cortex: fragile, pored epicortex, palisade plectenchymatous medulla: at least partially pale yellow, yellow-orange or orange-red; cell walls: containing isolichenan photobionts: primary one a Trebouxia, secondary photobiont absent lower surface: black, moderately to densely rhizinate; rhizines: black, simple, sparsely furcated or squarrose Ascomata: apothecial, laminal, sessile to subpedicellate; disc: imperforate, brown to dark brown; exciple: gray or hyaline; epihymenium: light brown; hypothecium: hyaline asci: lecanoral, with thickened wall layers apically, with divergent axial body towards apex; apex: amyloid ascospores: c. 8 per ascus, spores simple, broadly ellipsoid, 8-15 x 5-8 µm Conidiomata: pycnidial, laminal, immersed conidia: bacilliform or weakly bifusiform, 4-7 x 1 µm Secondary metabolites: upper cortex with atranorin, chloroatranorin and secalonic acides; medulla with ß-orcinol depsidones, hopane triterpenes and secalonic acids Geography: temperate and tropical regions with a distribution center in Japan Substrate: on bark, rarely rock. Notes: This genus is segregated from Parmelina, from which it differs in having a yellow or orange medulla, slightly larger ascospores, and at least partly squarrose rhizines. Also it contains secalonic acids and lacks lecanoric acid. Another segregatge, Parmelinopsis, has simple and dichotomously branched rhizines, a white medulla, and lacks secalonic acid derivatives and hopane triterpenes.
Species within checklist: Shenandoah National Park
Myelochroa aurulenta
Image of Myelochroa aurulenta
Map not
Available
Myelochroa galbina
Image of Myelochroa galbina
Map not
Available
Myelochroa obsessa
Image of Myelochroa obsessa
Map not
Available

 

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