Cardaria draba (L.) Desv.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Erect perennial to 6 dm, vigorously spreading by creeping roots, short-hairy below, less so or glabrate upwards, the sep and fr glabrous or very nearly so; cauline lvs oblong to ovate or obovate, ascending or erect, sessile, au2riculate, irregularly toothed or entire, to 9 × 4 cm; racemes numerous, dense, commonly forming a white top across the summit of the pl; mature pedicels 10–15 mm; sep 2–2.5 mm; fr 2.5–3 × 3–5 mm, somewhat inflated but usually constricted at the narrow partition, cordate or subcordate at base; 2n=32, 64. Fields, roadsides, and waste places; native of the Middle East and e. Mediterranean region, now a serious weed in w. U.S. and adj. Can., and occasionally found in our range. May–July. (Lepidium d.)
heart-podded hoary cress