Stems arising singly from a slender rhizome, 2-6 dm, with 1-5 adjacent hemispheric heads, these 2-8-fld, 8-15 mm thick; lvs mostly basal; 1 or 2 short cauline lvs often developed; sep carinate, lanceolate, 4.4-5.7 mm, acuminate, narrowly scarious-margined; pet oblong with broad scarious margins, 4.5-6 mm, acute; stamens 6, considerably shorter than the tep; anthers light yellow, 2-2.5 mm, longer than the filaments; fr trilocular, ellipsoid, 4-5 mm, half as thick, with a beak 0.5-1 mm; seeds ca 0.5 mm, apiculate at both ends; 2n=40. Damp meadows and shores; widespread in the w. cordillera, e. to Neb. and nw. Minn.; w. Ont.; Nf.