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|I’d Call It That||3.0||5.39||1||(Gerhard)|
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This looks most like a sick Heterodermia, maybe H. speciosa. Orange pigment in truly orange species is from anthraquinones (usually) which react very strongly K+ wine/red. This looks too brown. And the overall shape just has the look of Heterodermia, not Xanthoria sensu lato (which would be the prime suspect for truly orange foliose lichens).
Created: 2012-01-28 14:09:55 PST (-0800)
Last modified: 2012-01-28 14:27:26 PST (-0800)
Viewed: 17 times, last viewed: 2017-06-10 06:31:12 PDT (-0700)