Observation 68637: Lichen P. Micheli
When: 2011-05-21
Who: zaca
No herbarium specimen

Notes: I was not able to establish the genus of this specimen.

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I see what you mean
By: Jason Hollinger (jason)
2011-06-04 22:49:31 CDT (-0400)

Wow, not sure what it could be, then. Do you have any species of Pyxine there? I thought it always had black rhizines, though.

This photograph
By: zaca
2011-06-04 21:36:51 CDT (-0400)

is the only record I keep from the specimen of that crazy day. My issue is also whether it is crustose or foliose. In principle the suggestion of Lecanora is good. However, I seem to see at the bottom of the photograph some small white rhizines (where one of the lobes is slightly raised).
Unfortunately, this is not unique. I have some more problems like this.
Thanks, Jason, for the help.

Has me stumped, too
By: Jason Hollinger (jason)
2011-06-04 20:31:39 CDT (-0400)

I can’t quite decide if it is foliose or crustose.

If foliose: Dirinaria has black underside without any rhizines and lobes shaped like this, but none of the photos I see on-line show the black “leaking” onto the margins on the upper side like this. Hypogymnia does that frequently, but it is much larger and obviously hollow / inflated. It doesn’t look like it has rhizines, which would rule out all other foliose genera, I think. (Looking at the underside would remove all room for doubt here.)

If crustose: I wonder if it’s one of the effigurate Lecanora, related to L. muralis, say. But it’s weird not to see any apothecia on such a well-developed specimen. For that matter, yours doesn’t show any soredia, isidia OR apothecia. Bizarre.

Created: 2011-06-04 19:22:52 CDT (-0400)
Last modified: 2011-06-04 19:22:53 CDT (-0400)
Viewed: 53 times, last viewed: 2016-03-30 04:13:39 CDT (-0400)
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