Observation 87269: Lichen P. Micheli

When: 2012-01-31

Collection location: Davis, California, USA [Click for map]

Who: Byrain

No specimen available

Notes:
This observation is for the white thallus, growing on the ruins of an old stone building and nearly completely covering what’s left of one of the walls.

Now that I have seen the pictures, my guess is that the brown apothecia are unrelated, maybe Acarospora?

And my chemistry is K-, C-, KC+ yellow/green, for the KC I first applied K to the thallus with one end of the q-tip and then C with the other to the same spot. Maybe the green is from the algae and the test is more yellow?

Images

197808
197809
197810
197811
197812

Proposed Names

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Comments

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Interesting thing
By: Jason Hollinger (jason)
2012-02-01 12:20:47 PST (-0800)

It looks a lot like what the Sonoran Flora calls “Aspicilia simoensis”, but that should be K+y to red, and would definitely be visible (I would think) using the Q-tip test. It has the same chalky-white “ugly” thallus full of pustules breaking up into coarse soredia. But yours also has lots of Lecanora-like apothecia. None of the sorediate Lecanora in the Sonoran Flora seem to match, either, though.

I agree, the brown thing has to be something else. Totally different texture. Acarospora is a possibility, also consider Peltula, Placidium(?) or maybe other squamulose genera.

Created: 2012-01-31 18:18:19 PST (-0800)
Last modified: 2012-01-31 18:18:21 PST (-0800)
Viewed: 26 times, last viewed: 2017-06-10 06:42:36 PDT (-0700)
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