Erect, taprooted biennial (annual) 1-3 m; lfls lanceolate or oblanceolate to narrowly oblong or rarely ovate, 1-2.5 cm; racemes numerous, 5-20 cm (peduncle included); pedicels 1-2 mm; fls white, 3.5-5(-6) mm, the banner distinctly longer than the wings; ovules 2-4; fr 2.5-3 mm, reticulate-veiny; seeds 1 or 2; 2n=16. Native of Eurasia, established as a weed along roadsides and in waste places, especially in calcareous soil, from N.S. to B.C., s. to Mex. and W.I. Summer and fall.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.