Observation 48554: Micarea denigrata (Fr.) Hedl.

on shaded old dirty weathered wood in chaparral at around 3000’

(Note, the C+r spot test is tricky: I found that it happened in a few tiny scattered spots, and in fact I failed to notice the first time I tried it. The C+r reaction on the epihymenium is more reliable seen under microscope.)


apothecial section in water at 100x
spore in water at 1000x
bottom half shows same apothecial section with K+ pale violet reaction in epihymenium

Proposed Names

87% (1)
Eye3 Eyes3
Used references: Lichen Flora of the Greater Sonoran Desert Region, Vol. III. 2007. Fryday and Coppins.
Based on microscopic features: spores 10-13 × 3-4 µm, septate, exciple poorly developed or absent
Based on chemical features: epihymenium gray, K+ pale violet, C+ fleeting red; thallus C+ fleeting red in spots

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2010-07-14 19:04:06 CDT (-0500)
Last modified: 2010-07-14 19:04:09 CDT (-0500)
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