General:
Annual or biennial herb from a taproot; stems usually solitary, 10-30 cm tall, simple or branched, glabrous.
Leaves:
Basal leaves pinnate, terminal leaflet linear-oblong to oblanceolate; stem leaves with 3-6 pairs of leaflets, linear or narrowly oblanceolate, not over 2 mm wide, entire.
Fruits:
Siliques, ascending, 1-3 cm long; styles 0.5-1.5 mm long.