greater yellow lady's slipper
[Cypripedium calceolus var. planipetalum (Fern.) Victorin & Rouss., more]
Relatively robust, with large fls, the pet 5-8 cm, the lip 3-5 cm, occurs in mesic woods nearly throughout our range. (C. pubescens)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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