Observation 112870: Ochrolechia A. Massal.
When: 2012-09-09
(45.7012° -120.9201° )
No herbarium specimen

Notes: On old growth Quercus garryana. Facing South-southwest.

Proposed Names

56% (1)
Eyes3
Recognized by sight: thick creamy thallus and lecanorine apothecia

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Was Rhizocarpon a typo?
By: Jason Hollinger (jason)
2012-10-09 16:08:16 CDT (-0400)

I don’t think that genus ever occurs on bark, and it has small black lecideine apothecia. Maybe you meant Rhizoplaca? Still, this is clearly crustose, and again, on bark not rock. I think your only choices are Lecanora or Ochrolechia. Ochrolechia requires careful K, C and UV test on cortex and medulla and disk of apothecia. Most species have some C+ red or pink somewhere, which is pretty rare in Lecanora. Spore size and overall size and “luxuriousness” and color of the apothecia together all help confirm the genus.

Created: 2012-10-09 02:24:39 CDT (-0400)
Last modified: 2012-11-04 00:58:22 CDT (-0400)
Viewed: 26 times, last viewed: 2017-06-14 06:28:19 CDT (-0400)
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