Observation 111587: Peltigera polydactylon (Neck.) Hoffm.
When: 2012-09-29
Who: zaca
No herbarium specimen

Proposed Names

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Eye3
Recognized by sight

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Eye3 = Observer’s choice
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Yes, brown under margins
By: Jason Hollinger (jason)
2012-09-30 11:35:56 PDT (-0700)

is not uncommon for specimens of P. polydactylon in very exposed locations. I see it a lot in the Great Smoky Mountains, and I’ve seen it in the alpine in the Washington Cascades.

Peltigera polydactylon seems the best choice,
By: zaca
2012-09-30 08:30:51 PDT (-0700)

at least from the species appearing in the British Flora and on British websites. I didn’t found any apohecia and didn’t observe any pruina on margins. According with my short experience it doesn’t look like P. neckeri, mainly by the more lighter color of thallus and the brown color of the underside at margins.

By: Jason Hollinger (jason)
2012-09-29 23:44:21 PDT (-0700)

I think not P. neopolydactyla because the thallus is too thick, not undulating at all, and the veins don’t look right. (Sorry, too tired to remember exactly how!) But it could also be P. neckeri. Can you find any apothecia in these photos? I couldn’t. If clearly black, then probably P. neckeri. Although do note that this specimen looks sunburnt or something, so even P. polydactylon might have particularly dark apothecia in such a case. You can also check for pruina near the lobe margins. I couldn’t find any, but maybe someone else can? Pruina would also suggest P. neckeri pretty strongly.

Created: 2012-09-29 13:45:39 PDT (-0700)
Last modified: 2012-09-29 23:40:44 PDT (-0700)
Viewed: 35 times, last viewed: 2016-10-25 06:20:43 PDT (-0700)
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