Descripcion

Vine climbing or suffrutescent, twining, stems simple or few branched, pilose to pubescent, indumentum white to light yellow, with sparse yellow vesicular glands, but lacking bulbous-based trichomes. Stipules 2–4.4 × 1–2 mm, free, caducous, lanceolate, externally pubescent with yellow vesicular glands, but lacking bulbous-based trichomes. Leaves trifoliolate; petiole 3–8.5 cm long; leaf rachis 0.8–4.3 cm long; stipels persistent; leaflets 2.3–12.5 × 2–11.1 cm, ovate or deltoid to rhombic, surface not bullate, attenuate to acuminate at apex, truncate to cuneate at base, margin entire, pilose to pubescent, with yellow vesicular glands on abaxial surface. Inflorescences axillary, paniculate, 5–30 cm long, many-flowered, exceeding the length of the subtending leaf; bracts caducous; pedicels 2–4 mm long. Flowers 5–10 mm long excluding the pedicel; calyx 3–4 mm long, pubescent with yellow vesicular glands, but lacking bulbous-based trichomes, lobes lanceolate, not exceeding the corolla in length; standard petal 4.5–10 × 4–5 mm, oblong to obovate, rounded at apex, pilose to pubescent, with yellow vesicular glands, but lacking bulbous-based trichomes, claw 1–2 mm long, auricle ca. 0.5 mm long; wing petals 6–10 × 1–2 mm, oblong, claw 1–2 mm long, auricle ca. 0.5 mm long; keel petals 6–10 × 2–3 mm, falcate, claw 1–3 mm long; stamens 6–8 mm long; ovary 2.5–3.2 mm long, pubescent, with yellow vesicular glands. Fruits 1.4–2.1 × 0.5–0.6 cm, reddish-brown to black, strongly constricted between the seeds, oblong to ovate, glabrescent, with a few yellow vesicular glands, but lacking bulbous-based trichomes. Seeds 4–6 × 3–4 mm, suborbicular, bicolored, black and red, the red confined to the hilar area.