Observation 108610: Rhizocarpon umbilicatum (Ramond) Flagey
When: 2012-09-04
Herbarium specimen reported

Notes: on limestone or skarn

Images

258842
apothecia up to 1mm
258843
note pruinosity of apothecial margin and on prothallus
258844
258845
both in H2O
258846
258847
258848
note anastamosed paraphs
258849

Proposed Names

83% (1)
Eye3 Eyes3
Used references: Thomson, J.W. (1997) American Arctic Lichens, 2. The Microlichens; Smith, C.W., Aptroot, A., Coppins, B.J., Fletcher, A., Gilbert, O.L., James, P.W. and Wolseley, P.A. (2009) The Lichens of Great Britain and Ireland; Dobson, Frank S. (2011) Lichens, An Illustrated Guide to the British and Irish Species
Based on microscopic features: hymenium 120u; hypothecium 175u; paraphases anastamosed, approx 2u diameter with thickened apical cell; spores 8/ascus, average 26×14u, muriform, average 12segments, only becoming brown when shriveled
Based on chemical features: medulla K+yellow; crystals – some soluble in KOH

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Nice!
By: Jason Hollinger (jason)
2012-09-04 16:26:47 CDT (-0400)

Love the photo of anastomosing paraphyses, too. :)

Created: 2012-09-04 16:05:00 CDT (-0400)
Last modified: 2012-09-04 16:05:03 CDT (-0400)
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