Accepted By:
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Anderson, L. E., H. A. Crum & W. R. Buck. 1990. List of mosses of North America north of Mexico. Bryologist 93: 448–499.
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Grout, A. J. 1936-1939. Moss Fl. N. Amer. 1: 1–264. Author, Newfane, Vermont.
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Stark, L. R. & A. T. Whittemore. 1992. Additions to the bryoflora of southern California. Bryologist 95: 65–67.
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Zander, R. H. 1994. Phascum in A. J. Sharp et al. (editors), Moss Flora of Mexico. Mem. New York Bot. Gard. 69: 377–380.
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