Cypripedium reginae Walter. Section: Obtusipetala. Showy Lady's-slipper, Queen Lady's-slipper. Phen: May; Jun-Jul. Hab: Fens, seepage swamps, and mesic forests, over circumneutral to basic rocks. Dist: NL (Newfoundland), ON and SK south to NC (?), ne. TN, c. TN (Breeden 2018), n. AR, and e. ND.
Origin/Endemic status: Native
Syn: = Ar, C, F, FNA26, G, Il, K1, K3, K4, Mi, Mo1, NE, NY, Pa, RAB, S, Va, W, WV, Correll (1950), Luer (1975)