Observation 223798: Xanthoparmelia subramigera (Gyelnik) Hale
When: 2015-10-24
No herbarium specimen

Proposed Names

-17% (2)
Recognized by sight
-46% (2)
Based on microscopic features: isidiate, underside brown, etc..
-3% (2)
Eye3
Based on chemical features: K-
84% (1)
Eyes3
Based on chemical features: K~ yellowish (weak and slow), C-, KC~ fleeting pinkish, P+ yellow turning instantly dark orange-red

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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The color is misleading
By: Jason Hollinger (jason)
2015-12-23 12:00:24 EST (-0500)

This is definitely Xanthoparmelia. It really does look greenish in person. Must have been strange lighting when you took the photos. Besides the cortex is distinctly KC+ gold confirming presence of usnic acid. (But you have to be quick because the cortex also contains atranorin, I think, as it was K+ slowly yellow as well.)

In any case, the P+o/r reaction indicates protocetraric and/or fumarprotocetraric acid, ruling out almost everything but X. subramigera.

Could this be Xanthoparmelia instead?
By: Jason Hollinger (jason)
2015-12-04 12:44:58 EST (-0500)

Brown underside should rule out Parmelinopsis. Doesn’t look at all like Parmotrema subtinctorium. Running out of options…(!) Try X. subramigera, for example.

Created: 2015-11-24 10:17:53 EST (-0500)
Last modified: 2015-12-23 11:57:36 EST (-0500)
Viewed: 82 times, last viewed: 2016-03-04 14:28:12 EST (-0500)
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