Synstemonanthus Botschantzev.

Herbs annual or biennial. Trichomes flattened, strongly crisped, simple or minutely stalked and forked. Stems erect or ascending, often branched basally. Basal leaves petiolate, rosulate or not, simple, pinnatipartite, or pinnatisect, often withered by flowering. Cauline leaves petiolate or sessile, not auriculate, entire or pinnatisect. Racemes ebracteate, elongated in fruit. Fruiting pedicels ascending or divaricate. Sepals oblong, ascending, base of lateral pair not saccate. Petals lavender, much longer than sepals; blade obovate, apex rounded; claw subequaling sepals, sparsely to densely pubescent. Stamens 6, tetradynamous; filaments glabrous or sparsely to densely pubescent on proximal half, slightly dilated at base, median pairs united only basally; anthers oblong, apiculate at apex. Nectar glands confluent and subtending bases of all stamens; median glands present. Ovules 20-36 per ovary. Fruit dehiscent siliques, linear, latiseptate, sessile or shortly stipitate; valves papery, with a distinct midvein, sparsely pubescent basally when young, torulose; replum rounded; septum complete, membranous, translucent, veinless; style to 1 mm; stigma capitate, entire. Seeds uniseriate, winged distally, oblong, somewhat plump; seed coat minutely reticulate, mucilaginous when wetted; cotyledons incumbent.

* Two species.