in J. Franklin et al., Narr. Journey Polar Sea, 762. 1823.
Plants erect, 12–38[–50] cm. Leaves 3–7, along length of stem, alternate, ascending to spreading; blade elliptic to elliptic-lanceolate or ovate-lanceolate, 5–19 × 1.5–6 cm. Flowers 1(–2); sepals white or green; dorsal sepal suborbiculate to obovate-orbiculate, rarely elliptic, 11–20 × (7–)9–15 mm; lateral sepals connate to nearly distinct, 6–12 mm, segments 3–6 mm wide; synsepal 6–15 mm wide; petals spreading, white, oblong to linear-elliptic, flat, 12–20 × 3–6 mm; lip white, rarely pinkish, obovoid, 11–20 mm; orifice basal but often proportionally very large, 9–13 mm; staminode cordiform-ovoid to ovoid-oblong. 2n = 20.
Phenology: Flowering Jun–Jul.
Habitat: Moist coniferous forests, thickets, openings, tundra, especially in coarse soils of terraces and stream banks
Elevation: 0–2200 m
Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Mont.