Tall liana. Indumentum of peltate, sometimes multiradiate stellate trichomes. Leaves: petiole 4–6 mm long; lamina elliptic, oblong or obovate, 7–18 cm long, 3–7 cm wide, rounded or obtuse at base, shortly acuminate at apex, glabrescent except on veins below; secondary veins 7–10 pairs. Flowers solitary; pedicel 14–20 mm long; submedial bract ovate, 6–9 mm long. Sepals connate and fully enclosing bud, splitting to mostly 3 lobes, 10–14 mm long, tomentose. Petals 6, both series similar, basally connate, obovate to suborbicular, strongly incurved towards tip, 15–28 mm long, 14–22 mm wide, tomentulose outside, puberulous within, crimson red. Stamens c. 120; 2.5–2.7 mm long, connective short, oblique. Carpels c. 30–40; ovary 2–2.4 mm long; ovules 13–15; stigma sessile, subglobular-obovoid. Apocarps ellipsoidal, 3–5 cm long 2.2–2.7 cm wide, glabrescent; stipe 2–6 cm long. Seeds irregularly lenticular, surface slightly undulate, brown.
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