Climbers to 6 m tall, most parts fulvous to blackish brown tomentose. Petiole 5-8 mm, blackish brown tomentose; leaf blade lanceolate to elliptic-lanceolate, 7-12 × 2-3.5 cm, thinly leathery, abaxially fulvous to blackish brown tomentose, adaxially glabrous, secondary veins 13-17 on each side of midvein and adaxially flat, reticulate veins prominent, base obtuse, apex acute to acuminate. Inflorescences axillary, 1-flowered. Pedicel ca. 5 mm, robust. Sepals ovate-oblong, ca. 5 mm, blackish brown villous. Petals thickened; outer petals oblong, ca. 1.4 cm, villous; inner petals shorter than outer petals, pubescent. Stamens oblong, nearly as long as carpels; connectives 3-angular, apex acute. Carpels fulvous pubescent; ovules 10 per carpel, in 2 series; stigmas apically 2-cleft. Fruiting pedicel 2-2.5 cm, densely blackish brown tomentose; monocarps globose to subglobose, ca. 1.8 × 1.5 cm, densely blackish brown tomentose. Seeds 7-9 per monocarp, deep yellow, reniform, ca. 10 × 6 mm. Fl. Feb-Aug, fr. Apr-Oct.