Sisymbrium officinale (L.) Scop.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Erect, 3–8 dm; lower lvs petioled, deeply pinnatifid, the segments oblong to ovate or the terminal one rotund, angularly toothed, upper lvs sessile or nearly so and often entire; pet light yellow, 3–4 mm; racemes stiffly erect, the mature pedicels closely appressed, 2–3 mm, thickened above; frs closely appressed, subulate, 8–15 mm, 1–1.5 mm wide at base; 2n=14. Native of Eurasia, commonly established as a weed throughout most of the U.S. May–Sept.