Observation 223798: Xanthoparmelia subramigera (Gyelnik) Hale

When: 2015-10-24

Collection location: Oak Mountain State Park, Shelby Co., Alabama, USA [Click for map]

Who: Vitaly Charny (vcharny)

No specimen available

Proposed Names

-17% (2)
Recognized by sight
-46% (2)
Based on microscopic features: isidiate, underside brown, etc..
-2% (2)
Based on chemical features: K-
84% (1)
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


Add Comment
The color is misleading
By: Jason Hollinger (jason)
2015-12-23 09:00:24 PST (-0800)

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 09:44:58 PST (-0800)

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 07:17:53 PST (-0800)
Last modified: 2015-12-23 08:57:36 PST (-0800)
Viewed: 84 times, last viewed: 2017-06-21 02:47:06 PDT (-0700)
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