Observation 112870: Ochrolechia A. Massal.

When: 2012-09-09

Collection location: Columbia Hills Natural Area Preserve, Klickitat Co., Washington, USA [Click for map]

45.7012° -120.9201°

Who: nastassja (Nastassja Noell)

No specimen available

On old growth Quercus garryana. Facing South-southwest.

Proposed Names

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

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Was Rhizocarpon a typo?
By: Jason Hollinger (jason)
2012-10-09 15:08:16 CDT (-0500)

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 01:24:39 CDT (-0500)
Last modified: 2012-11-03 23:58:22 CDT (-0500)
Viewed: 26 times, last viewed: 2017-06-14 05:28:19 CDT (-0500)
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