Substrate: Dirt on top of rock, unprotected from sun and wind.
Habitat: Rocky, open area in ecotone between sagebrush steppe and riparian aspen community. (Same area as Dermatocarpon specimen)
Description: Difficult to find mature specimens. Abundant on rocks in plot. Short rhizines or cilia, black, on underside. Photo shows soralia/soredia on terminal margins, not sure until looking under dissecting scope.
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It does look like Physcia (P. dimidiata maybe?), but it shouldn’t be black underneath. It does happen, though. Andrew K. showed me a specimen of P. aipolia that was black below with squarrose rhizines(!) If not Physcia it would have to be Physconia, I think, because none of the Phaeophyscia really match (they all have either coarse isidioid soredia or laminal soralia). So, maybe a Physconia with the pruina washed off? P. perisidiosa? Beats me!
Created: 2012-05-26 15:55:20 PDT (-0700)
Last modified: 2012-05-27 15:34:55 PDT (-0700)
Viewed: 94 times, last viewed: 2017-06-12 23:03:29 PDT (-0700)