Notes: growing on saffron plum bark at edge of hardwood hammock (Sideroxylon celastrinum)
Canoparmelia amazonica is also in the key, with same chemistry, but with globose to cylindrical isidia. I don’t know, I think some of these isidia looked flattened. Certainly one of the two, though, based on the KC+p reaction.
Further information from Hale’s monograph (Hale, Jr., M.E. 1976. A Monograph of the Lichen Genus Pseudoparmelia. Smithsonian Contributions to Botany, 31):
According to Hale, neither has the “inflated” isidia that Harris mentions. (Hale keys inflated isidia to Pseudoparmelia erumpens.) Hale further remarks that C. martiniciana is one of the most common species in the West Indies (the parent biogeographic region of the Florida Keys).
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