Consortium of Lichen Herbaria
- building a Global Consortium of Bryophytes and Lichens as keystones of cryptobiotic communities -
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Polychidium muscicola (Sw.) Gray  
Family: Massalongiaceae
[Collema muscicola (Sw.) Ach., moreCornicularia muscicola (Sw.) DC., Garovaglia muscicola (Sw.) Trevis., Homodium muscicola (Sw.) Nyl., Leptogium muscicola (Sw.) Fr., Lichen muscicola Sw., Parmelia muscicola (Sw.) Ach., Patellaria muscicola (Sw.) Wallr.]
Polychidium muscicola 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.
Thallus: minutely fruticose, forming small, loosely interwoven, decumbent to cushion-like masses and strands lobes: 60-125 (-200) µm thick, progressively narrowed toward apices; tips: terete, often nodulose; short cilia present, toward the base these becoming rhizines branches: dichotomous or palmate, not coralloid; lateral axes of similar size or with a main axis and smaller side branches, up to 4 mm tall surface: chestnut brown, dark brown, or blackish (sometimes grayish in shade), sparsely to richly and divergently branched; tips shiny cortex: 1-2 (-3) cells thick, cells rounded or ± angular, 4-7 µm diam., the wall somewhat thickened, colorless or ± brown medulla: interior hyphae loosely interwoven, more or less parallel to the surface, toward the base forming a paraplectenchyma photobiont: Nostoc, with bluegreen or green cells, not in obvious chains Apothecia: often common, up to 2 mm in diam., lateral; disc: red-brown, brighter when wet; margin: paler, concolorous with thallus; hymenium: 90-100 µm; paraphyses: septate, unbranched, 1-2 um thick, with a swollen apical cell to 4.5 µm wide; subhymenium: 70-100 µm asci: clavate, 45-62 x 4.5-6.5 µm, 8-spored ascospores: fusiform, hyaline, sometimes becoming pale red-brown, 1-septate, 19-25 (-29) x (4-) 4.5-6.5 (-7) µm Pycnidia: sometimes present conidia: bacilliform, 1.5-3.5 x 1 µm Spot tests: K-, C-. KC-, P- Secondary metabolites: none detected. Substrate and ecology: on moss (or soil), usuaully in moist situations and over acidic rocks, often in and near streams, sometimes also at the bases of mossy trees World distribution: North America, Europe, tropical East Africa and the Canary Islands Sonoran distribution: southern California.
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Stephen Sharnoff
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Stephen Sharnoff
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Stephen Sharnoff
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Stephen Sharnoff
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Stephen Sharnoff
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Stephen Sharnoff
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Stephen Sharnoff
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Stephen Sharnoff
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Ken Schneider
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This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394
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