Glabrous perennial with densely tufted stems 3-10 cm; lvs long-petioled, oval or elliptic, 5-10 mm; fls 2-5, white; pet 3-5 mm; axis of the raceme scarcely elongating, the frs 2 cm, erect, crowded, on pedicels 3-5(-10) mm, the beak 1-1.5 mm; 2n=16. Circumboreal, s. in our range to the higher mts. of Me. and N.H. Summer.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.