Annuals, 15-35(-50) cm tall. Stems branched, terete. Leaves 3-5(-9)-foliolate, canescent, usually densely pubescent with straight simple trichomes (0.5-)0.6-1 mm; petiole 1.5-6 cm; terminal leaflet broadly ovate or suborbicular, rarely narrowly ovate, 1.5-2.5 × 0.8-2.8 cm, base slightly cordate or subtruncate, margin 3-lobed, lobes deeply crenate, ending in a small callose mucro, apex rounded; lateral leaflets petiolate or sessile, blade 6-10 mm, base attenuate. Racemes ebracteate, elongated in fruit; rachis slender, slightly to strongly flexuous, at least apically. Fruiting pedicels slender, straight, spreading, 5-10(-15) mm, pubescent or rarely glabrous. Sepals oblong, 1.5-2 × 0.7-1.2 mm, pubescent outside. Petals white, obovate, 2-3.5 × 1-1.5 mm, base shortly clawed, apex rounded. Filaments 1.3-2 mm; anthers ovate, ca. 0.3 mm. Fruit narrowly oblong, oblong-lanceolate, or sublinear, (2.5-)3-5 × 1-1.2 mm, plump; valves navicular, pubescent or sometimes glabrous, thickened at margin; septum complete or perforate; style 0.3-0.7(-1.2) mm. Seeds (2-)5-10 in each locule, brown, reticulate, ovate, 0.7-0.9 × 0.5-0.7 mm. Fl. and fr. Jun-Sep. 2n = 12*.
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