Stellate-canescent annual to perennial, stiffly erect, usually branched above, to 7 dm; lvs oblanceolate, (1-)2-5 cm, acute, entire; fls white, 3 mm wide; fr elliptic, plump, thinly hairy, 5-8 נ3-4 mm, convex over the whole surface; seeds 3-6 per locule; 2n=16. Native of Europe, established as a weed throughout much of our range, especially northward.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.