Publication: Gen. Sp. Orchid. Pl. 528. 1840.
selected vouchers: WTU
Notes: FNA26: "Plants of Cypripedium montanum grown in exposed, relatively sunny situations have the ascending leaves inserted along the basal portion of the stem and the flowers displayed well above the leaves. In shadier, especially sheltered sites, the spreading leaves may be more evenly scattered along the stem. In this species the apical margin of the orifice of the lip is usually acute, in common with C. candidum, and in contrast to the usually obtuse margin in C. parviflorum; this difference can aid determination of discolored herbarium specimens. Hybrids of C. montanum and C. parviflorum have been designated C. × columbianum Sheviak. See 11. C. parviflorum for a general discussion of hybridization and variation within and between related species."