Annual or winter-annual to 3 dm; basal lvs lance-ovate to oval, elliptic, or obovate, 1-2.5 cm; cauline lvs similar, few to several, all below the middle of the stem, often dentate, pubescent with simple and branched hairs; pet yellow, turning white in age, 2 mm; mature raceme loose and elongate, to 2 dm, glabrous, with widely spreading or ascending glabrous pedicels to 3 cm; frs ascending to erect, glabrous or hirsutulous, linear-oblong, 5-10 mm; 2n=16. Dry soil, prairies, and hillsides; widespread in Eurasia and much of w. N. Amer., extending e. to Lake Superior and locally in Mich. and sw. Que. (D. lutea)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.