Arabis bulbosa Schreber ex Muhlenberg, Trans. Amer. Philos. Soc. 3: 174. 1793; A. rhomboidea Persoon; Cardamine rhomboidea (Persoon) de Candolle; C. rhomboidea var. hirsuta O. E. Schulz; C. rhomboidea var. parviflora O. E. Schulz; C. rhomboidea var. pilosa O. E. Schulz; Dentaria rhomboidea (Persoon) Greene; Dracamine bulbosa (Schreber ex Muhlenberg) Nieuwland

Perennials; glabrous or sparsely pubescent distally. Rhizomes (tuberous at stem base, sometimes also at intervals) subglobose, lobed, 4-15 mm diam. (fleshy). Stems erect, unbranched, (1-)2-6 dm, glabrous or sparsely pubescent on distal 1/2 (trichomes 0.02-0.1 mm). Rhizomal leaves simple, (2-)4-13(-16) cm; petiole (1.5-)2.5-10(-13) cm; blade usually reniform to cordate or ovate, rarely oblong, (1-)2-4(-6) cm, base obtuse to cordate, margins usually repand or entire, rarely shallowly dentate. Cauline leaves (2-)4-10 (-14), simple, petiolate or sessile; (middle ones) shortly petiolate or (distally) sessile, base not auriculate; blade ovate to oblong, or oblong-linear to lanceolate, 3-6(-9) cm × 10-30(-45) mm, margins entire, repand, or dentate (margins minutely pubescent). Racemes ebracteate. Fruiting pedicels ascending to divaricate, (10-)15-22 (-30) mm. Flowers: sepals oblong, 2.5-4.5 × 1.5-2 mm, lateral pair not saccate basally, (glabrous); petals usually white, rarely pale pink, obovate, (6-)7-12(-16) × 3-5 mm, (short-clawed, apex rounded); filaments: median pairs 4.5-7 mm, lateral pair 2-3.5 mm; anthers oblong, 1-1.5 mm. Fruits linear, 2-3.5(-4) cm × 1.4-1.7 mm; ovules 14-24 per ovary; style 2-4(-5) mm. Seeds dark orange to greenish yellow, oblong or globose, 1.7-2.1 × 1-1.4 mm. 2n = 16, 56, 64, 80, 96, 112.

Flowering Mar-Jun. Wet grounds, low woodland, moss hummocks, alluvial woods, grassy floodplains, wet pastures, meadows, pinelands, creek bottoms, stream banks, sandy bottoms, ditches, mesic or wet forests, swamps, marshes, seepy bluffs; 0-900 m; Man., Ont., Que.; Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis.