Observation 59599: Dermatocarpon luridum (With.) J.R. Laundon

When: 2010-11-07

Collection location: Dabney Creek, Madison Co., Arkansas, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

Notes:
growing in huge colonies underneath horizontal limestone ledge which is wet from seepage most of the year

I don’t get this genus yet. While these were very crowded together, individual thalli all appeared to have a single point of attachment. The tan smooth underside and large perithecia, as well as lack of brown pigment apparently all point to D. muhlenbergii (recently separated from D. miniatum), the most common species in the Ozarks.

Images

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Proposed Names

87% (1)
Eye3 Eyes3
Recognized by sight: green when wet, spores > 15um, multiple holdfasts
Used references: Preliminary keys to Ozark lichens (Harris & Ladd 2005)

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2010-11-24 08:09:27 PST (-0800)
Last modified: 2015-12-20 23:22:08 PST (-0800)
Viewed: 75 times, last viewed: 2018-06-05 19:43:23 PDT (-0700)
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