Notes: 32°0’25.90"N 109°18’43.72"W, Massai Point, Chiricahua National Monument, Cochise Co., Arizona, el. 2090 m.
This is one of the most common lichens on the dramatic rhyolite rock formations in the pine-oak woodland at Chiricahua National Monument in SE Arizona. An excellent photo of that scenery was Botany Photo of the Day on 24 July 2006, and several names were suggested in the ensuing discussion, but they did not reach a definitive conclusion. I wonder if it might be Pleopsidium chlorophanum, one of the gold cobblestone lichens, although its color in life is a brilliant day-glo chartreuse, and not at all gold. This species is not illustrated in Brodo, Sharnoff, and Sharnoff, but there are several photos on CalPhotos and Google images.
Note added on 26 Jan 2009: Thank you to Tom Nash for confirming the identification of this lichen as Pleopsidium chlorophanum.
Common name: gold cobblestone lichen
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Created: 2011-06-21 16:30:18 CDT (-0500)
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