Erect or spreading, branching, glab. herb; stems woody below, up to 5 dm. tall and c. 5 mm. diam. or more, marked by scars of fallen lvs. Lower lvs c. 3 to 10 mm. long, up to 8 cm. broad, narrowly to broadly obovate-oblong to elliptic-oblong, cuneately narrowed to broad flat semiamplexicaul petiole, sharply serrate to dentate-serrate in upper half. Upper lvs smaller and narrower, with few teeth; floral lvs 3 to 1 cm. long, ± obovate-oblong, crenate-serrate. Racemes terminal, simple to much-branched, branches c. 5 to 10 cm. long. Fls ∞, c. 2 mm. diam.; pedicels slender, ascending, c. 5 mm. long. Sepals broadly ovate, ± 1 mm. long; petals somewhat longer, obovate with short claw; stamens 4, glands 4, lanceolate. Silicles broadly ovate in outline, compressed, subacute, very slightly notched, 3-5 mm. long; style about = notch. Seeds ovoid, compressed, reddish brown, < 2 mm. long.

n = c. 36 bivalents

Glabrous perennial. Stems decumbent to erect, stout, usually flexuous, to 50 cm tall. Lvs all similar, narrow-oblanceolate to obovate, evenly toothed in distal portion, cuneately narrowed to winged petiole at base, bright green, fleshy, 2-10 × 1.5-4 cm. Racemes terminal and lateral, 5-10 cm long at fruiting; pedicels erecto-patent, (3)-5-10 mm long at fruiting. Sepals 1-1.5-(2) × 0.5-1 mm. Petals white, obovate-spathulate, slightly > to twice length of sepals. Stamens 4. Silicles broadly ovate, usually truncate at base, acute at apex, not winged, 3-4-(5) × 2.5-3.5-(5) mm; style 0.1-0.2 mm long; seeds ovoid, brown, not winged, 1.5-2 mm long.