Growing on the bark of a living oak tree. I collected a bit of it to work on when I have time.
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For small, dull/pruinose, pale, gray, non-sorediate, non-isidiate, non-lobulate things on bark on the west coast:
Physcia aipolia – conspicuously mottled white surface, medulla K+y
Physcia stellaris – mottled or not, lightly pruinose or not, medulla K-
Physcia biziana – heavily pruinose (obscuring surface), medulla K-
Since there is little mottling and little pruina, P. stellaris looks best from where I sit.
Created: 2011-11-06 23:53:15 PST (-0800)
Last modified: 2011-11-06 23:53:15 PST (-0800)
Viewed: 134 times, last viewed: 2017-06-10 00:42:06 PDT (-0700)