Observation 77439: Umbilicaria
When: 2011-09-25
Who: zaca
No herbarium specimen

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Better specimens
By: Jason Hollinger (jason)
2011-09-30 10:12:58 PDT (-0700)

The round apothecia without ridges / fissures rules out U. polyrrhiza. Lack of soredia even on such well-developed thalli would seem to rule out U. hirsuta. The abundant apothecia and nonpruinose surface rules out U. americana and U. vellea. Not big and thick enough and too fertile to be U. mammualata. The only other species with dark rhizines are U. angulata (angular fissured apothecia_) and U. scholanderi (blackish upper surface)… and a few even more different things. I’m stumped.

Created: 2011-09-27 12:10:07 PDT (-0700)
Last modified: 2011-09-27 12:10:09 PDT (-0700)
Viewed: 38 times, last viewed: 2016-05-13 02:14:34 PDT (-0700)
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