Observation 95994: Physcia aipolia (Ehrh. ex Humb.) Fürnr.

Proposed Names

8% (2)
Recognized by sight: on dry branch of apple, aerobiontic
28% (1)
Recognized by sight: not quite good enough photos to be sure this isn’t P. aipolia. Ideally you’d want to do K test in medulla to be sure, anyway: P. stellaris is K-, P. aipolia K+y (both are K+y on the surface).
84% (1)
Recognized by sight: see comments

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Works for me!
By: Jason Hollinger (jason)
2012-06-01 16:53:58 CDT (-0400)
It has to be
By: Gerhard Koller (Gerhard)
2012-06-01 15:05:38 CDT (-0400)

Physcia aipolia. I see tiny white dots on the thalli if I am not erring and I believe the medulla is K y+ but not sure about that at all.

By: Jason Hollinger (jason)
2012-06-01 14:46:00 CDT (-0400)

The only trick is to distinguish between K+ in the medulla and the K+ from the cortex. If you cut/scratch a patch of cortex off exposing the white medulla, try applying KOH solution with needle or toothpick of capillary tube or something very small. Helps to do it under a dissecting scope.

Does the K reaction still work
By: Gerhard Koller (Gerhard)
2012-06-01 14:28:55 CDT (-0400)

on herbarium material?

Created: 2012-06-01 09:27:57 CDT (-0400)
Last modified: 2012-06-01 16:54:09 CDT (-0400)
Viewed: 48 times, last viewed: 2017-06-13 02:30:33 CDT (-0400)
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