Observation 49486: Ochrolechia A. Massal.
When: 2010-08-01
Who: zaca
No herbarium specimen

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good point
By: Jason Hollinger (jason)
2010-08-02 17:13:56 PDT (-0700)

The only Pertusaria in the Sonoran Flora with well-formed disk-shaped apothecia on rocks is P. flavicunda, which is “endemic to western North America”. Hmmm. But there aren’t any rock-dwelling Ochrolechia in the same flora without the usual enormous apothecia. Wait, there are two additional brown-spored Pertusaria (sometimes placed in Megalaria apparently) with disk-shaped apothecia on rocks, but I haven’t seen photos of them: P. islandica and P. occidentalis. I agree with you that it doesn’t look like any Lecanora, at least.

Summary: I’m stumped! :)

I have considered some species of …
By: zaca
2010-08-02 15:22:44 PDT (-0700)

Pertusaria and some of Lecanora as well. The first I eliminate because (at least the species I saw) either the margins of discs are more wrinkled or the thallus is more greenish. Similarly, I eliminate Lecanora because either they live on trees or the margins of the discs are more thin.
Do you have any particular species in mind?
(This is a beatiful specimen, indeed!)

Could be Pertusaria, too
By: Jason Hollinger (jason)
2010-08-02 13:47:45 PDT (-0700)

(Gorgeous specimen!)

Created: 2010-08-02 01:53:23 PDT (-0700)
Last modified: 2010-08-14 11:38:55 PDT (-0700)
Viewed: 26 times, last viewed: 2016-10-21 22:01:18 PDT (-0700)
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