Collection location: Vavenby Limestone South, British Columbia, Canada [Click for map]
Found mostly sterile on limestone in sheltered locations, but one thallus with apothecia (which from appearance at 30x and chemistry I’m inferring to be the same thing) growing among Psora himalayana on mossy exposed rock.
SQUAMULES more ascending than usual and overlapping somewhat, K-, C-, KC-
APOTHECIA reddish-brown, plane when very young, very soon becoming convex and emarginate
EPIHYMENIUM brown, K+ red, POL+ bright red-brown
HYPOTHECIUM reddish-brown, POL+ bright red-brown, K-?
SPORES 8 per ascus, simple, hyaline, smooth, elliptical, 9.7-14 × 6.3-7.9 µm (Q=1.3-1.8 — averaging 1.6) (N=18)
This keys out more convincingly as Psora pseudorussellii however that species doesn’t belong anywhere near here:
|P. tuckermanii||1.36||brown, always? convex and emarginate||western|
|P. pseudorussellii||1.67||red-brown, flat and marginate at first||eastern and southern|
Interesting. But frustrating.
|User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote.|
|I’d Call It That||3.0||0.00||0|
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Created: 2009-06-05 17:54:27 CDT (-0400)
Last modified: 2009-06-05 17:54:27 CDT (-0400)
Viewed: 177 times, last viewed: 2018-04-12 10:47:27 CDT (-0400)