Biennial to 1 m, simple or few-branched, glabrous and glaucous throughout, except the sparsely hirsutulous, spatulate basal lvs; cauline lvs (averaging ca 13 below the first fl) narrowly lanceolate, 5-15 cm, serrate to entire, usually sagittate at the sessile base; cal 3-5 mm; pet white, 3-6 mm, equaling to a fourth longer than the sep; pedicels at maturity widely spreading, 7-12 mm; frs widely spreading to somewhat decurved, arcuate, linear, flat, 5-10 cm נ1.2-2 mm, nerveless or faintly nerved to the middle; seeds in 1 row, oblong, narrowly winged; 2n=14. Woods and hillsides; Que. to S.D., s. to Ga. and Okla. Apr.-June. Var. burkii Porter, with nonsagittate cauline lvs, occurs from Pa. and Md. to Va. and W.Va., sometimes on shale-barrens.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.