When: 2009-06-19

Collection location: near Chetwynd, British Columbia, Canada [Click for map]

Who: Jason Hollinger (jason)

Specimen available

on exposed sandstone on grassy S-facing slope

(See also observation 53840.)


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Add Comment
I thought so at first, too…
By: Jason Hollinger (jason)
2010-09-27 14:44:46 CDT (-0400)

…but all my specimens were keying out to himalayana, despite variation in size and color. Hmmm. I’ll split up the observation, since they are obviously different specimens. Should have done that to begin with. Thanks for keeping me honest!

Possibly two species of Psora here
By: Chris Parrish (kitparrish)
2010-09-17 22:38:32 CDT (-0400)

The dark brown squamules with white-pruinose raised edges and black apothecia in photo 97362 seems to represent Psora himalayana. In the other three photos, the light brown squamules with reddish brown apothecia suggest Psora tuckermannii. See the excellent key and photos in McCune and Rosentretter, 2007, “Biotic Soil Crust Lichens of the Colombia Basin,” pp.78-80. Super photos!