Aristolochia indica L.

Vigorous twiner, glabrous; stems to 10 m long. Leaves: pseudo-stipules absent; petiole 1.2–3.5 cm long; lamina oblong to obovate, 3.5–12 cm long, 1.5–6.8 cm wide; base broadly cuneate; apex usually abruptly acuminate. Inflorescence a 3–8-flowered raceme, rarely terminal; pedicels 0.6–1 cm long. Calyx straight, greyish green outside, purplish bronze inside, deeper purple in throat with prominent white hairs, glabrous outside; utricle globose, 0.5–0.6 cm long; tube 10–15 mm long; limb 1-lobed, obovate, 1–1.5 cm long, 0.5–0.7 cm wide, acute. Fruit obovoid, 2–3 cm long, 1.5–1.8 cm diam., not beaked. Seed cordate-ovate, flat, c. 6 mm long, c. 6 mm wide, c. 0.2 mm thick, smooth, laterally winged; wing c. 1 mm wide.

Grows in coastal vine thicket.