Observation 106189: Parmotrema A. Massal.
When: 2012-08-20
No herbarium specimen

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Recognized by sight
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Recognized by sight

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By: Jason Hollinger (jason)
2012-08-20 14:20:49 CDT (-0400)

I think. It has those broad rounded lobes and general look of a Parmotrema. Since it is fertile and lacking (?) soredia or isidia, that leaves only these two species. KOH on the inner medulla would distinguish the two species: P. performatum is K+ yellow to deep blood-red quickly; P. michauxianum is K-. (Also you might verify that it doesn’t have a dense network of fine little cracks all over the upper surface, which would indicate Rimelia cetrata.)

Created: 2012-08-20 10:46:50 CDT (-0400)
Last modified: 2012-08-20 13:10:30 CDT (-0400)
Viewed: 12 times, last viewed: 2017-06-13 22:06:59 CDT (-0400)
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