Dioecious, woody climber, to 5 m high. Leaves flammuliform, usually with 12–15 leaflets; leaflets narrow-ovate to lanceolate, entire or deeply 3-sect, terminal leaflet 12–45 mm long, 1.5–5 (–11) mm wide, mucronate to emarginate, glabrescent. Flowers in axillary and terminal dichasial panicles. Tepals linear-lanceolate, 2–3 cm long, pale green to creamy white, pubescent below with tomentose margins, glabrous above. Stamens 1.5–5 mm long; filaments glabrous, white; anthers elliptic to ovate, 0.5–1 mm long, without appendage; staminodes present. Achenes compressed-ovoid, 4–5 mm long, c. 2.5 mm wide, light brown, glabrous or with short, sparse hairs, margin corky; awn 1.5–3.5 cm long.