Herbs with caudices. Stems 8–35(–50) cm. Leaves: basal in rosettes; petiole 2–10 cm; blade (of larger leaves) ovate to suborbiculate, 6–40 × 4–30 mm, base rounded to cordate, apex rounded; cauline usually on proximal 1/2 of stem, rarely on distal 1/2. Flowers: sepals spreading or ± reflexed in fruit, linear to narrowly lanceolate, 4–11 mm, margins not hyaline, entire, apex subacute; petals 5–11-veined, obovate, (7–)8–17(–20) × 5–12 mm, length 1.5–2 times sepals, base rounded, margins entire; stamens 6–8 mm; anthers 1.5–2.8 mm; staminodes obovate, divided distally into (7–)9–27 gland-tipped filaments, 5–9 mm, ca. as long as stamens, apical glands suborbicular to ovoid, 0.2–0.5 mm; ovary green. Capsules (6–)8–10 mm. 2n = 18, 36.
Plants 2–4 dm; blades of basal lvs broadly ovate to subrotund, 1–3 cm, 3/4 to fully as wide, at base broadly rounded to more often cordate, not decurrent; cauline lf as large as the basal, broadly ovate, sessile and cordate-clasping; pet 5–17-nerved, 9–13 mm, half longer to twice as long as the lance-triangular green sep; staminodes green or yellow, 5–9 mm, dilated to an obovate or reverse-triangular scale with 9–23 short, slender filaments on the distal margin; 2n=18, 27, 36, 54. Calcareous shores and wet meadows; circumboreal, s. in Amer. to Nf., Mich., Minn., Wyo., and B.C.