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Erect or decumbent perennial herb, 7.6-30 cm tall, from a softly woody carrot-like or fusiform rootstock up to 25 cm long. Stems with dense to scattered spreading hairs. Leaflets 3, oblong or elliptic to linear-lanceolate, 0.8-7 cm long, 0.3-3.2 cm wide, acute to rounded at the apex, rounded at the base, glabrous to pubescent or pilose on both surfaces, often rather characteristically margined with short hairs, ±3-nerved from the base; venation raised and reticulate on both surfaces; petiole 1.5-8 cm long; rhachis 2.5-9 mm long; petiolules 0.5-1.5 mm long; stipules oblong-lanceolate to lanceolate, 4-7 mm long, somewhat bilobed at the base, veined. Racemes axillary, (1-)2-several-flowered, subumbellate; peduncle 3.5-20 cm long, somewhat thickened towards the apex; pedicels 1-2 mm long; bracteoles subpersistent, minute, ±1.5 mm long, 1-nerved. Calyx-tube glabrous or hairy, truncate at the base in fruit, nerved, 2-3.5 mm long; lobes deltoid, 2-3.5 mm long, ciliate or minutely ciliolate, sometimes slightly tuberculate, the upper pair joined for two-thirds or more of their length to form a bifid lip. Standard pale creamy-yellow, green with or without mauve basal stripes or entirely mauve, obovate, 1-1.4 cm long, 0.8-1.3 cm wide, emarginate, glabrous; wings green with mauve margins; keel green, elongated, shaped very much like the end of a canoe. Pods± erect, linear-cylindrical, 4-6 cm long, 2-3 mm wide, yellowish pubescent or covered with very minute scale-like hairs, ±17-20-seeded. Seeds brown, sometimes faintly mottled with black, subcylindrical or rectangular, longest dimension 1.8-2.5 mm., shorter dimensions 1.5-2 mm.; hilum minute, central or eccentric; aril not developed.
