Acarospora fuscata: Difference between revisions
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Revision as of 06:42, 9 November 2014
| Acarospora fuscata | |
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| Acarospora fuscata | |
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| Species: | A. fuscata
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| Acarospora fuscata (Schrader) Arnold
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Acarospora fuscata ("brown cobblestone lichen") is a glossy pale or yellowish brown areolate lichen with angular areolas that grows up to 10 cm wide on non-calcareous rock in low and high elevations.[1]: 217 [2] It grows in Europe and North America.[2] It grows in sourthern California and on the eastern part of the Sierra Nevada range.[1]: 217 It may grow with the areolas disconnected.[1]: 217 The areolas may lift at the edges, but the areolas do not overlap like true squamules.(sub-squamulose)[1]: 217 More common in the Sierras is the similar species Acarospora thamnina, which is truly squamulose with overlapping scales.[1]: 217
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It usually has 0-1 apothecium per areole, which may be point-like (punctiform) or fill the entire areole with a disc that is rough surfaced and reddish brown. The asci are club shaped (clavate), with over 100 spores.[2] Lichen spot tests are K-, C+ vaguely pink, KC+ red, and P-.[1]: 217 [2] Secondary metabolites include gyrophoric acid.[2]