Notes: Habitat: Growing on a huge Black Cottonwood, Populus trichocarpa, beside the Avalanche Creek nature trail in Glacier National Park.
Identification: DeBolt and McCune (1993, p.195) list two species of Chrysothrix in Glacier National Park: candelaris growing on bark, and chlorina growing on rocks. For years, people have been identifying Chrysothrix by making this simple distinction based on substrate, but more recently a number of new species of Chrysothrix have been described from eastern North America, so western material might bear re-examination.
Ann DeBolt and Bruce McCune, Lichens of Glacier National Park, Montana, The Bryologist, Vol. 96, No. 2 (Summer, 1993), pp. 192-204.
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