Herbs perennial, canescent throughout, with simple caudex terminated in a central rosette and covered with leaf or petiole remains of previous seasons. Trichomes sessile, 12–20-rayed, stellate, without webbing between rigid rays, at least those on leaves often umbonate, simple trichomes absent. Multicellular glands absent. Stems erect to ascending, originating laterally from below central rosette, leafy, not spiny. Basal leaves petiolate, rosulate, simple, entire, with a distinct midvein abaxially; cauline leaves petiolate, not auriculate at base, entire. Racemes several to many flowered, ebracteate, corymbose, slightly elongated in fruit; rachis straight; fruiting pedicels ascending to divaricate, straight, densely pubescent, persistent. Sepals oblong, free, deciduous, erect, pubescent, unequal, base of lateral pair saccate; petals yellow, erect at base with flaring blade, much longer than sepals; blade obovate, glabrous, apex obtuse; claw strongly differentiated from blade, longer than sepals, glabrous, unappendaged, entire; stamens 6, distinctly exserted, erect, tetradynamous; filaments narrowly winged, unappendaged or lateral pair sometimes minutely toothed, glabrous, free; anthers oblong, not apiculate; nectar glands 2, lateral, ring-like, surrounding base of lateral stamen, or U-shaped and subtending it, median glands absent; ovules 12–16 per ovary; placentation parietal. Fruit dehiscent, capsular broad siliques or narrow silicles, oblong to elliptic or narrowly so, strongly latiseptate, not inflated, unsegmented; valves thin leathery, veinless, densely pubescent outside, very sparsely pubescent inside, not keeled, smooth, wingless, unappendaged; gynophore absent; replum rounded concealed by connate valve margins; septum complete, membranous, veinless; style 7–10 mm long, filiform, pubescent along proximal half, caducous; stigma capitate entire, unappendaged. Seeds biseriate, winged all around, ovate or broadly so, strongly flattened; seed coat not mucilaginous when wetted; cotyledons accumbent.