Comments: Cypripedium parviflorum var. pubescens grows in boggy areas, swampy areas, damp woods (often with a rich layer of humus and decaying leaf litter), near rivers or canal banks (Great Plains Floral Association 1986, Swink and Wilhelm 1994, Weber and Wittmann 1996, Hulten 1968, Cronquist et al. 1972), and in wet meadows (in the Pacific Northwest) (Welsh et al. 1993). In Kentucky it is reported from dry mesic woods and occasionally associated with open glades (Kentucky Natural Heritage Program).
It has also been associated with rocky wooded hillsides on north or east facing slopes, wooded loess river bluffs, and moist creeksides or swales in spruce zones. Soils are sandy loams to loams.
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