Climbers to 13 m tall. Branchlets, petioles, and flowers densely appressed reddish brown pubescent, glabrescent. Petiole 0.8-1.2 cm; leaf blade oblong to oblong-elliptic, 5-10 × 1.5-3 cm, leathery, abaxially densely appressed reddish brown pubescent, adaxially glabrous except for appressed pubescence on midvein, secondary veins 8-13 on each side of midvein, slender, and adaxially flat, base rounded, apex acute to shortly acuminate. Inflorescences leaf-opposed, 1-flowered; bracts triangular. Flowers ca. 1.2 cm in diam. Pedicel ca. 1 cm. Sepals broadly triangular, ca. 6 mm, basally connate. Outer petals rounded, ca. 6 mm, incurved; inner petals ca. 4 mm, inside basally depressed. Stamens oblong, ca. 1 mm; connectives 3-angular. Carpels oblong, ca. 2 mm, sericeous pubescent; ovules ca. 14 per carpel, in 2 series; stigma apex entire. Fruiting pedicel ca. 2 mm, robust; monocarp stipes ca. 1.5 cm; monocarps globose, ovoid-ellipsoid, or ellipsoid, ca. 3 × 2 cm, densely reddish brown tomentose, apex rounded or mucronulate. Seeds ca. 14 per monocarp, brown, in 2 series, ovoid, subflattened, ca. 1.4 × 0.9 cm. Fl. Apr-Nov, fr. Jun-Dec.

Fissistigma cupreonitens is listed as Endangered (EN B2ab(ii,iv)) by the IUCN Red List of Threatened Species (Version 2010.3; http:// www.iucnredlist.org; accessed on 8 Oct 2010).

● Densely forested slopes; 300-1000 m. SE Guangxi.