Strong dioecious, woody climber, to 5 m high. Leaves usually biternate with c. 9 (rarely fewer) leaflets, sometimes incompletely triternate; leaflets narrowly oblong to narrowly lanceolate, 15–75 mm long, 4–11 mm wide, entire, acute to obtuse, glabrescent. Flowers in few–many-flowered, short, axillary and terminal dichasial panicles. Tepals narrow-oblong, 1.5–3.5 cm long, white, pubescent below in bud, glabrescent later, glabrous above, with narrow, tomentose margin. Stamens 2–8 mm long; filaments glabrous, white; anthers broadly ellipsoidal to ± globular, 0.5–1 mm long, without appendage; staminodes present. Achenes compressed-ovoid-falcate, 4–6 mm long, 1.5–2 mm wide, glabrous; margin not prominent; awn 6.9–12.6 cm long.
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