Biennial or short-lived perennial 3-15 dm; stem commonly hirsute below with mostly simple (sometimes bifurcate) hairs, glabrous and glaucous above; lower lvs commonly with Y-shaped hairs; cauline lvs overlapping below, more remote above, all lanceolate or lance-oblong, auriculate-clasping, usually glabrous and glaucous; pet 3-6 mm; style 1-1.5 mm; mature pedicels erect, 7-16 mm; frs erect, subterete, 5-9 cm נ0.8-1.3 mm, the valves with prominent midnerve reaching nearly or quite to the tip; seeds in 2 rows in each locule, angular, very narrowly winged; 2n=12. Usually in dry soil; circumboreal, in Amer. s. to N.C., Ark., Kans., N.M., and Calif. May, June.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.