Observation 52325: Lecanora muralis (Schreber) Rabenh.
When: 2010-08-18
Who: zaca
No herbarium specimen

Proposed Names

61% (2)
Eye3 Eyes3
Recognized by sight
Based on chemical features: See attached photo

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Yes,
By: zaca
2010-09-08 17:24:20 MDT (-0600)

maybe the popularity comes from being widespread all over the world and, in particular, for being cosmopolitan.

It is a very common species… most places!
By: Jason Hollinger (jason)
2010-09-08 17:13:22 MDT (-0600)

Most of all it is cosmopolitan, found all over the world, even somewhat tolerant of city pollution. It can be the most abundant crustose lichen in semiarid climates, such as interior California. I believe it is known as “wall rim lichen” because of its affinity for brick and stone walls in cities. But I guess it shouldn’t come as a surprise that there are places where it is out-competed by other species.

This species is a mistery for me:
By: zaca
2010-09-08 16:56:42 MDT (-0600)

It is referred in almost every general text about lichens but, as far as I understand, is not so common. At least I saw it only once. On the other hand, for instance, L. campestris is really common, since it appears almost everywhere I made observations.
I had no doubts about the classification when I saw it, but … Thanks, Jason, for the confirmation.

Paler than usual
By: Jason Hollinger (jason)
2010-09-08 16:45:19 MDT (-0600)

But this species is highly variable.

Created: 2010-09-08 15:13:01 MDT (-0600)
Last modified: 2010-09-08 16:44:47 MDT (-0600)
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