Observation 113161: Parmotrema perlatum (Hudson) M. Choisy
When: 2012-10-06
Who: zaca
No herbarium specimen

Proposed Names

-3% (2)
Based on chemical features
28% (1)
Eyes3
Recognized by sight: sorediate
Based on chemical features: K+y medulla

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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I’m sure you can read
By: zaca
2012-10-13 07:19:02 PDT (-0700)

all those details much better than I do, mainly taking into account that I not so familiar with Parmotrema crinitum, which is relatively rare here.

Okay, I’ll back off a bit
By: Jason Hollinger (jason)
2012-10-12 13:48:26 PDT (-0700)

But when I look at the full-size version of the top image, I see what looks like clumps of soredia. All the photos I see on MO and on-line for P. crinitum shows scattered isidia, even when they are granular and sort of look like soredia. Also note that P. crinitum seems invariably to have scattered laminal isidia, especially toward the interior where the isidia have a tendency to become lobulate and ciliate. But maybe yours is just a very young specimen.

Due to the dimensions,
By: zaca
2012-10-12 13:05:16 PDT (-0700)

I cannot say if it is isidia or soredia, I can only say that “something” is there. Not even with the hand lens I can be sure. So, I based my proposal according to the other features.

Wait, this is sorediate
By: Jason Hollinger (jason)
2012-10-11 15:31:33 PDT (-0700)

P. crinitum is supposed to be isidiate. I think that leaves P. chinense based on the K+y reaction. Doesn’t really look like it, though. Am I wrong about the soredia?

[EDIT: sorry, I mean perlatum, I guess. Always forget which is the correct name…]

Created: 2012-10-11 09:36:44 PDT (-0700)
Last modified: 2012-10-13 07:19:53 PDT (-0700)
Viewed: 52 times, last viewed: 2016-10-27 01:09:06 PDT (-0700)
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