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But I agree… with myself, I guess!… it has to be P. caseana. Read the paper which describes this species. Hodkinson and Lendemer talk about the variation in material they saw from eastern US. I think it was clear that they felt there were probably multiple species involved, but that more research would be required to make sense of it. They particularly called attention to a “Cetrelia-like” morphology they found in the Appalachians (and probably also the Great Lakes region – they have very similar flora). The bottom photo really shows this: looks more like a Parmotrema than anything else there, but sure enough, it has punctate pseudocyphellae. It is odd that the soredia are primarily marginal in this material, but I guess that’s just par for the course.
Punctelia caseana is supposed to have these rounded soralia that you can clearly see in the first photo, and are barely seen in the rest of them. Jason might be able to comment on this observation, since he has a specimen of this.
Created: 2012-02-29 20:50:31 CST (-0500)
Last modified: 2012-02-29 20:53:00 CST (-0500)
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