There is a problem with this collection: it is not known to occur in Oregon. But the description in Mosses… and the photos in Brodo match so closely, I think this must be a match. I think the range just got extended.


Proposed Names

19% (2)
Used references: Mosses, Lichens and Ferns of Northwest North America; Brodo.
85% (1)
Recognized by sight: Dull upper surface; white, “soft”-looking, long rhizines.

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I don’t think this is horizontalis.
By: Jason Hollinger (jason)
2009-08-26 02:51:14 PDT (-0700)

That species is more shiny, and the rhizines are very different (black-tipped and in concentric rows near the margin). It could well also be P. cinnamomea (especially given the brownish tinge to the upper surface) but I think the rhizines that are visible are more typical of P. membranacea.