Cardamine cordifolia A.Gray

Perennials; glabrous or densely puberulent. Rhizomes cylindrical, slender or stout, 1.5-3 mm diam., (not fleshy). Stems erect, unbranched or branched distally, 2-7(-10.2) dm, glabrous or sparsely to densely puberulent basally or throughout. Rhizomal leaves usually absent, rarely present, simple, 5-15 cm; petiole 2.5-12 cm; blade reniform to cordate, 1.5-4.5(-6) cm. Cauline leaves (3-)5-17(-23), simple or, rarely, proximalmost 3-foliolate, petiolate; petiole 1-6.5(-8.5) cm, base not auriculate; blade reniform, deltate-cordate, or ovate-cordate, (1-)2-7.2(-9.7) cm × 10-55(-85) mm, (somewhat fleshy), base cordate or truncate, margins crenate to slightly sinuate, (veins ending in apiculae, surfaces glabrous or sparsely to densely pubescent). Racemes ebracteate. Fruiting pedicels divaricate to ascending, (7-)10-20 mm. Flowers: sepals oblong, 2.5-4.5 × 1.5-2 mm, lateral pair slightly saccate basally; petals white, broadly obovate, 7-12 × 4-6 mm (claw to 6 mm, apex rounded to subtruncate or emarginate); filaments: median pairs 3.5-5 mm, lateral pair 2-3.5 mm; anthers oblong, 1-1.5 mm. Fruits linear, (2-)2.5-3.7(-4) cm × 1.2-2 mm; (valves glabrous or sparsely puberulent); ovules 14-24 per ovary; style 0.5-3(-6) mm. Seeds brown, oblong, 1.6-2 × 1-1.3 mm. 2n = 24.

It grows in moist stream banks. In Canada it grows up to sub-alpine sites.