Perennial herb to 0.6 m tall Stem: upright or spreading, shortly hairy below, becoming less hairy upwards. Leaves: alternate, appearing to clasp the stem, to 9 cm long, to 4 cm wide, arrow-shaped, sometimes irregularly toothed. Flowers: in a dense, branched cluster (raceme). Racemes numerous. Sepals four, 2 - 2.5 mm long, and hairy. Petals four, white, bases narrowed. Stamens six. Fruit: an indehiscent pod (silicle), 3 - 4.5 mm long, 2.5 - 4.5 mm wide, inflated, rounded with a point, divided into two segments, and hairy. Seeds one per chamber.
Similar species: No information at this time.
Habitat and ecology: Probably introduced from Eurasia. Rare in the Chicago Region, with a single collection made in 1941 in Walworth County, Wisconsin. Look for this species in fields, along roadsides, and in disturbed areas.
Occurence in the Chicago region: non-native
Etymology: Cardaria comes from the Greek word kardia, meaning heart, which refers to the nearly heart-shaped seeds. Pubescens means downy.
Much like the previous 2 spp., but the pubescence extending to the sep and frs; fr inflated, obovoid to subglobose, 3-4.5 נ2.5-4.5 mm; mature pedicels shorter, to 10 mm, but the racemes often more elongate at maturity; 2n=16. Native of the Middle East and c. Asia, now intr. in N. Amer. in the same kinds of places as no. 1. (Hymenophysa p.) [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.