Changes

*Slender, erect, annual or short-lived perennial herb up to 70 cm tall, with a taproot; stem simple or branched, angled and striate, almost glabrous to hairy. *Leaves alternate, basal ones in a rosette; stipules absent; petiole short; blade very variable, from undivided and coarsely toothed to pinnatipartite, oblanceolate in outline, 3–15 cm long, base attenuate, apex rounded to acute; stem leaves few, sessile, amplexicaul, blade smaller than basal leaves, usually undivided, oblong. *Inflorescence a terminal raceme up to 20 cm long. *Flowers bisexual, regular, 4-merous; pedicel c. 6 mm long, elongating in fruit, up to 20 mm long; sepals c. 1.5 mm long, green, mostly pubescent; petals spatulate, 2–3 mm long, clawed, white; stamens 6, 4 longer and 2 shorter; ovary superior, dorsiventrally flattened, style c. 0.5 mm long. *Fruit a heart-shaped silique, 5–10 mm × 2.5–8 mm, dehiscing by 2 net-veined valves, many-seeded. *Seeds oblong, 0.5–1 × 0.5 mm, reddish to yellowish brown, with 2 longitudinal grooves, mucilaginous when wet. *Seedling with epigeal germination.