Lepidium densiflorum Schrad.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Thinly short-hairy annual or biennial, 2–5 dm; basal lvs 4–7 cm, coarsely dentate to pinnately lobed; cauline lvs shorter, linear or narrowly oblanceolate, mostly entire, sharply acute; mature racemes erect, 5–10 cm, with 9–15 frs per cm; pet none, or shorter than the sep, linear to narrowly spatulate; stamens 2; fr 2–3.3 mm, nearly or fully as wide, obovate-obcordate, generally broadest a little above the middle, narrowly winged above; stigma included in the notch; cotyledons incumbent; 2n=32. Dry or moist soil, waste grounds, roadsides, and pastures; throughout our range and w. to the Rocky Mts. May, June. (L. apetalum, misapplied; L. neglectum)