DistributionRead full entry
Cypripedium parviflorum is a taxonomically complex species, however it is treated here as a single species which is widespread across North America. The range of the species extends from Alaska in the west to Nova Scotia in the east, south to Nebraska and Georgia. The species occurs from British Columbia to Washington and Oregon, east of the Cascade crests, to Idaho, Wyoming, Utah, Colorado, New York, and to much of eastern Canada and the U.S. The extent of occurrence (EOO) is estimated at 11,849,400 km² and the area of occupancy (AOO) is estimated at 2,670 km². The species can be found up to 2,900 m altitude.
Sources: Arditti et al. 1979; Coleman 2002; Cribb 1997; Dorn 2001; Frosch and Cribb 2012; Kartesz 1994; Lesica 1986; Luer 1975; Meads et al. 2000; Mergen 2006, Sheviak 1974, 2002; Weber and Wittmann 2012; Welsh 1974.