Description from Flora of China
Cardaminopsis (C. A. Meyer) Hayek; Hylandra Á.. Löve.
Herbs annual, biennial, or perennial with stolons or woody caudex. Trichomes simple, mixed with stalked, 1-3-forked ones. Stems erect or decumbent, often several from base, usually glabrous above. Basal leaves rosulate, entire, toothed, or pinnately lobed. Cauline leaves petiolate or subsessile, entire, dentate, or rarely lyrate. Racemes few to several flowered, ebracteate. Fruiting pedicels ascending or divaricate or slightly reflexed. Sepals oblong, erect or ascending, glabrous or pubescent, base of lateral pair subsaccate or not. Petals white, pink, or purple; blade obovate, spatulate, or oblanceolate, apex obtuse or emarginate; claw distinct or not. Stamens 6, erect, slightly tetradynamous; filaments not dilated basally; anthers oblong, obtuse. Nectar glands confluent, subtending bases of filaments. Ovules 15-80 per ovary. Fruit dehiscent siliques, linear or cylindric, terete or flattened and latiseptate, shortly stipitate or subsessile; valves papery, veinless or midvein distinct, glabrous, smooth or somewhat torulose; replum rounded; septum complete; style obsolete or to 1 mm; stigma capitate, entire. Seeds numerous, uniseriate, wingless or margined, oblong or ellipsoid, plump or flattened; seed coat minutely reticulate, mucilaginous or not when wetted; cotyledons accumbent or rarely incumbent.
Nine species: E and N Asia, Europe, North America; three species in China.