Usually tall annual herb, up to a meter high, more or less hairy with glandular and eglandular hairs. Leaves 3-5-foliolate, petiolate; leaflets obovate, elliptic-oblong, very variable in size, often 2-4 cm long, 1.5-2.5 cm broad, middle one largest; petiole up to 5 cm long. Racemes elongated, up to 30 cm long, with corym¬bose flowers at the top and elongated mature fruits below, bracteate. Flowers 10-15 mm across, whitish or yellowish; pedicels 6-20 mm long; bracts foliaceous. Sepals oblong-lanceolate, 3-4 (-6) mm long, 1-2 mm wide, glandular-pubescent. Petals 8-15 mm long, 2-4 mm broad, oblong-obovate. Stamens 10-12 (rarely more, up to 20), not exceeding the petals; gynophore absent. Fruit 30-75 mm long, 3-5 mm broad, linear-oblong, erect, obliquely striated, tapering at both ends, glandular-pubescent, slender; style 2-5 mm long; seeds many, 1-1.4 mm in diam., glabrous with longitudinal striations and transverse ridges, dark brown.