Aristolochia acuminata Lam.

Robust climber; stems to 10 m long; young branches ± pubescent, glabrescent. Leaves: pseudo-stipules absent; petiole 2–6 cm long; lamina broadly ovate to triangular-ovate, 9–23 (–28) cm long, 4.5–16.5 (–21.5) cm wide, glabrous on both surfaces; base deeply cordate; apex acuminate. Inflorescence a (3–) 6–10-flowered raceme; pedicels 0.5–0.8 cm long. Calyx straight or slightly curved, reddish brown to maroon, sparsely puberulent outside; utricle globose, 0.5–0.6 cm long; tube 5–15 mm long; limb 1-lobed, oblong, 2–3 cm long, 0.7–0.9 cm wide, apiculate. Fruit obovoid to obloid, 3–4.5 cm long, 2.5–3 cm diam., not beaked. Seed cordate-ovate, flat, c. 4 mm long, c. 5 mm wide, c. 0.2 mm thick, ± smooth, laterally winged; wing 1.5–3 mm wide.

Forest and thickets, usually up to elevations of 800 metres, but to 1,350 metres in New Guinea.

Can be grown by cuttings or seedlings. Seeds needs soaking.