Annual to probably short-lived perennial herb with 10-40 cm high, ascending main stem, basally prostrate and rooting at nodes, from which one to several new stems may arise. Stems in lower parts mostly hispidulous without or with rather few, usually arcuate branches. Leaves glabrous or with a few scattered hairs, imparipinnate with 2-4 pairs of lateral leaflets; basal leaves 4-8 cm long with 1-4 cm long petioles, soon disappearing; cauline leaves often numerous, up to 9 cm but mostly much smaller with non-auriculate petioles; leaflets trifid, acute (often with a point), at base attenuate, cuneate (rarely truncate), 0.3-2.5 by 0.2-1.4 mm; terminal leaflet often larger and proportionately narrower than the lateral; petiolules 0-15 mm. Racemes terminal with 5-10 flowers on up to 4 cm long peduncles, in fruit up to 10 cm long; pedicels straight, erecto-patent, 4-10 mm long. Sepals green to reddish with hyaline margins, oblong, 2.5-3.5 by c. 1.2 mm. Petals white, spathulate, obtuse or emarginate, 2-3 times longer than sepals, 7-8 mm long, ± half as broad. Stamens 6 of nearly equal length with subulate filaments; anthers c. 0.8 mm long. Ovary bottle-shaped, with short distinct style and slightly expanded stigma. 5/7/-quae straight, linear, 20-38 by 1-2 mm; style 0.5-1.4 by c. 0.5 mm. Seeds red-brown, elliptic in outline, 1.4-1.8 by 1.2-1.4 mm, smooth.
Sandy or gravelly streambanks, moist forest clearings, moist eroded soil, in gardens; 900-4000 m.
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