Observation 130499: Parmotrema perlatum (Hudson) M. Choisy

When: 2013-03-20

Collection location: Braga, Portugal [Click for map]

Who: Elsa (pinknailsgirl)

No specimen available

On a Prunus spinosa in my backyard.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Elsa (pinknailsgirl)
2013-03-20 19:50:15 CDT (-0400)

I also suspected that there were two species on my tree, but wished someone to confirm that. TY Jason :)

Two species, I think
By: Jason Hollinger (jason)
2013-03-20 19:37:01 CDT (-0400)

image 316962 is Flavoparmelia caperata, as you suggest. But the others look more like Parmotrema. Notice the pustules in the Flavoparmelia, like the thallus gets little bubbles that grow and finally burst, releasing a bunch of coarse granular soredia. This is distinctive to F. caperata. Also the color is “greener” than Parmotrema — has usnic acid in the cortex (acts as sunscreen and/or herbivore defense, e.g., against snails). Most Parmotrema have atranorin instead, which is a sort of faintly bluish pale gray.

Created: 2013-03-20 13:54:41 CDT (-0400)
Last modified: 2013-03-20 20:49:14 CDT (-0400)
Viewed: 32 times, last viewed: 2018-01-01 12:59:06 CST (-0500)
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