Robust vine, twiner. Stems lenticellate; young branchlets smooth, sometimes narrowly winged. Leaves: petiole 1–3 cm long; lamina oblong to narrowly ovate, (4–) 4.5–20 cm long, 2–9 cm wide, abruptly acuminate, leathery, glabrous; venation interstitial, reticulate, prominent. Flowers ± pendant, 5–6 cm diam., with fetid odour; pedicel 7–15 mm long. Tepals 11–24, overlapping, very variable in size but outermost smallest, (3–) 5.5–30 mm long, 6–21 mm wide; outer tepals glossy green; inner tepals creamish green with red to purple dots. Stamens 7–11, ± flat to strongly boat-shaped, 14–17 mm long, 5–9 mm wide, ± acute to truncate or rounded; anthers 3–5 mm long. Staminodes 9–16, 15–17 mm long, narrow, often plicate. Carpels 8 or 9 [10–13, fide Zich et al. 2020], 6.5–9 mm long; ovary c. 3 mm long, with 4–14 ovules; styles c. 6 mm long. Fruit stalked, globose to ellipsoid or obloid, (3.8–) 5–7 cm long, 3–5 cm wide, fleshy, orange-yellow or ± orange; stalk c. 1.5–2 cm long. Seeds whitish to straw-coloured, often lenticular.
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