Weak dioecious climber, with stems 1–2 m long. Leaves biternate or flammuliform; first pinnae ternate (sometimes incompletely); leaflets 9–15, ovate, 0.5–4 cm long, 0.5–3 cm wide, deeply lobed, acute, usually serrate-dentate, glabrous or sparsely pubescent. Flowers solitary in axils or in axillary and terminal dichasial panicles. Tepals narrow-oblong, 0.8–2.5 cm long, white or pink, pubescent below with narrow tomentose margins, glabrous above. Stamens 2–10 mm long; filaments glabrous, often purplish maroon; anthers ellipsoidal, 0.7–1.5 mm long, without appendage; staminodes present, filaments often purplish maroon. Achenes scarcely compressed, straight, slender fusiform, c. 4 mm long, c. 1 mm wide, light brown, longitudinally ridged; awn 2–2.5 cm long.
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