Stems 5-20 cm from a slender caudex; basal lvs in a small rosette, oblanceolate to narrowly obovate, essentially sessile, 1-2 cm, ciliate below, few-toothed above; cauline lvs none; infl sparsely branched, most of the fls replaced by axillary bulbils, usually with a single terminal fl; pet white, clawed, 4-5 mm, subequal; 2n=56, 64. Circumboreal, s. to Mt. Katahdin, Me. (Hydatica f.; S. stellaris var. comosa)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.