Observation 87269: Lichen P. Micheli

When: 2012-01-31

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

Who: Byrain

No specimen available

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?



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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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