Petioles 1.5-5 cm, flat, glandular-hairy; lf-blades 4-10 mm, broader than long, much shorter than the petiole; stipules 4-6 mm, adnate, fimbriate along the upper half, scape glabrous, 7-35 cm, with 3-15 fls 4-7 mm wide; sep 4-5 mm; pet white to pink, spatulate, longer than the sep; seeds light brown, lustrous, 1-1.5 mm, sigmoid-fusiform, finely and regularly striate longitudinally; 2n=20. Common in bogs and swamps; circumboreal, in Amer. s. to S.C., Ga., Tenn., Ill., and Calif. June-Sept.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.