Observation 174140: Parmelia sulcata Taylor
When: 2014-08-03
Who: zaca
No herbarium specimen

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Comments

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P. hygrophila probably N. Amer. only
By: Jason Hollinger (jason)
2014-08-15 17:39:53 PDT (-0700)

You’re right. Just commenting that it looks “off”. Not very constructive, sorry!

I didn’t check
By: zaca
2014-08-15 17:15:06 PDT (-0700)

the rhizines in loco and I have no sample. I agree that the overall appearance is not of a “regular” specimen, but I not able to see the “isidioid soredia” referred in your comment. I don’t know if P. hygrophila exists here. It does not appear in the portuguese checklist, nor in the iberian checklist and is also not mentioned in the British Flora. On the other hand, I read that P. saxatilisis problably a complex of taxa and thus maybe this can be one of its variants.

the gestalt looks wrong
By: Jason Hollinger (jason)
2014-08-15 16:06:51 PDT (-0700)

It looks also like the soredia are isidioid in many places. Have you considered P. hygrophila or even P. saxatilis for this? Did you check the rhizines? P. sulcata rhizines have lots of tiny perpendicular side-branches, P. saxatilis and P. hygrophila have simple to forked rhizines instead (as you probably well know already!) P. hygrophila has “soft” granular isidia, P. saxatilis you are already perfectly familiar with. I’ve seen specimens which appear to be “rotten” P. saxatilis in which the isidia kind of break down, though. Worth considering the possibility that this may just be a variant of P. saxatilis.

Created: 2014-08-15 13:37:37 PDT (-0700)
Last modified: 2014-08-15 13:37:41 PDT (-0700)
Viewed: 16 times, last viewed: 2016-10-25 07:35:51 PDT (-0700)
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