Observation 53984: Peltigera aphthosa (L.) Willd.
When: 2010-05-22
No herbarium specimen

Proposed Names

-28% (1)
Used references: Hinds and Hinds, 2007, pp.355-374
56% (1)
Recognized by sight: broad weak veins starting well back from margins; is that an apothecium with continuously-corticate back in the first photo?

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
New photos
By: Jason Hollinger (jason)
2010-09-28 22:58:45 EDT (-0400)

Just noticed the great shots of the underside you added. Yes, I’d definitely say this is aphthosa group. I think the keys are misleading when they say aphthosa has no veins or weakly-developed veins. What your photos show is typical in my experience.

Observation 21587
By: Jason Hollinger (jason)
2010-09-28 22:55:38 EDT (-0400)

You saw what Trevor had to say about observation 21587 — about the only thing he seemed to be certain of was that it wasn’t leucophlebia! :)

It’s a tough group, compounded by the fact that there are definitely undescribed species in there which are being studied as we speak, and further confused because material of the same species seems to differ from coast to coast and north to south. Trevor relies heavily on characteristics of the cephalodia which I have yet to be able to understand, and which in any case are not going to be visible without a dissecting scope.

glimpses of apothecia
By: Chris Parrish (kitparrish)
2010-09-28 22:43:56 EDT (-0400)

Glimpses of apothecia, for sure. Next time will try for some clear photos of apothecia. Should observation 21587 from along the same trail along the south side of the bay be assigned to Peltigera aphthosa as well?

Overall look of leucophlebia, but veins look too weakly developed
By: Jason Hollinger (jason)
2010-09-28 22:28:08 EDT (-0400)

Trevor has talked about odd forms of P. aphthosa in eastern Canada before. My experience might be useless for Quebec.

Created: 2010-09-28 22:17:43 EDT (-0400)
Last modified: 2010-09-28 23:15:43 EDT (-0400)
Viewed: 261 times, last viewed: 2016-10-28 13:21:03 EDT (-0400)
Show Log