Glab. herb with branched, leafy, prostrate to suberect stems up to 3 dm. long. Lower lvs on broad flat petioles up to 5 cm. long; lamina up to 5 cm. long, oblong-cuneate, coarsely crenate-serrate; upper lvs subsessile, about ovate. Racemes ∞; fls c. 3 mm. diam.; pedicels slender, c. 5 mm. long; sepals broadly ovate-oblong, ± 1·5 mm. long; petals slightly longer; stamens 4, glands 4, oblong, very short. Silicles broadly ovate, 4-5 mm. long, slightly winged above, notch broad, shallow; style stout, about = notch. Seed compressed-ovoid, ± 2.5 mm. long, yellowish brown.

Glabrous perennial. Stems decumbent to ascending, stout, flexuous, 20-30 cm tall. Lvs all similar, obovate-spathulate, crenate to bluntly dentate. Rosette lvs 3-7 × 0.5-2 cm, cuneately narrowed to broad, flat petiole > lamina. Stem lvs toothed at apex, (0.5)-1-2-(5) × (0.3)-0.5-1.5 cm; petiole < lamina or 0. Racemes terminal on short leafy branchlets, (2)-3-5 cm long; pedicels erecto-patent, 3-5 mm long at fruiting. Sepals c. 1.5 × 0.8 mm. Petals white, obovate, < or = sepals. Stamens 4 or 6. Silicle broadly ovate, shallowly notched at apex, slightly winged, 4.5-5.5 × 4-4.5 mm; style very short; stigma = notch. Seeds broadly ovoid to triangular, brown, not winged, c. 2 x 2 mm.