Notes: Abundant on sandstone boulders in open sunny aspects with surrounding coast live oak (Quercus agrifolia).
Yellow-green foliose thallus, adnate, underside tan, showing white medulla where lower cortex flaking off, with short dark rhizines. Apothecia common, with black concave discs. No soredia or isidia. Upper cortex K-, C-, KC-. Medulla K+Y turning dark red (see photo). Not lobulate.
Co-occurs with Xanthoparmelia mexicana, an isidiate species. Xanthoparmelia coloradoensis differs from Xanthoparmelia lineola by being extensively lobulate in the center of the thallus, whereas X. lineola is not or only weakly so.
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Created: 2015-05-25 09:33:29 PDT (-0700)
Last modified: 2015-05-25 09:33:35 PDT (-0700)
Viewed: 16 times, last viewed: 2016-09-12 22:53:40 PDT (-0700)