Observation 92305: Lecanora perplexa Brodo
When: 2012-04-08
Herbarium specimen reported

Proposed Names

3% (2)
Recognized by sight
18% (2)
Eye3
Recognized by sight
-28% (1)
Recognized by sight
61% (2)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Jim Bennett returned tentative ID L.subimmergens/L.perplexa
By: Andrew Khitsun (Andrew)
2014-09-04 21:46:38 CDT (-0500)

Perplexing indeed. Thallus K+Y; apothecia epruinose, ~1mm

I think that probably counts as K+y for weak atranorin
By: Jason Hollinger (jason)
2012-04-11 20:49:33 CDT (-0500)

It can be unsatisfyingly ambiguous sometimes.

The apothecia are definitely not immersed or even semi-immersed or starting immersed but becoming sessile; that would seem to rule out L. subimmergens.

There is no pruina that I can see, suggesting L. perplexa, but that’s hardly conclusive. Color of apothecia might be different, by I don’t trust ids based entirely on color. Checking for granular epihymenium will help, but I’ve misdiagnosed this character before. Need microscope and polarizers for that, though. Spores don’t help. Would need TLC to check for presence of zeorin. (Or put a specimen in an herbarium and check for a fuzz of crystal growth after a few years. Get back to me on that. :)

I think we’ve done about as much as we can with this thing!

K test
By: Andrew Khitsun (Andrew)
2012-04-11 20:28:18 CDT (-0500)

K test produced no changes in thallus color, but medula became very pale yellow.

I agree, different-looking apothecia
By: Jason Hollinger (jason)
2012-04-09 20:53:51 CDT (-0500)

I’ve seen specimens of Lecanora with verruose thallus and rims like this. My best name so far is L. cenisia, but don’t quote me on it. (I see Brodo includes it in the key in Thomson’s Wisconsin flora – not surprising since it seems to be extremely widespread.) Would be good to get the K test to rule out all but L. cenisia, L. subimmergens and L. perplexa. (The last sounds the most promising in the key. Are there any photos on-line??)

Compare two observations.
By: Andrew Khitsun (Andrew)
2012-04-09 20:47:10 CDT (-0500)

At first I thought it was similar to observation 88595, but apothecia look different.

Created: 2012-04-09 20:42:34 CDT (-0500)
Last modified: 2014-09-05 14:23:26 CDT (-0500)
Viewed: 45 times, last viewed: 2017-06-12 21:22:38 CDT (-0500)
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