Description from Flora of China
Climbers to 8 m tall. Branchlets pubescent when young, glabrescent. Petiole 5-12 mm, densely appressed ferruginous pubescent; leaf blade lanceolate to oblong-lanceolate, 7-17 × 2-4 cm, papery to thinly leathery, abaxially ferruginous pubescent but denser on veins, adaxially glabrous except for pubescent midvein and secondary veins, secondary veins 14-21 on each side of midvein, obliquely ascending to margin, and adaxially impressed, base cuneate to broadly cuneate, apex acuminate. Inflorescences terminal or leaf-opposed, cymose, 1-4-flowered; peduncle 3-4 mm, pubescent; bracts ovate-lanceolate. Pedicel 1-1.5 cm, ferruginous pubescent, bracteolate between base and middle. Sepals ovate-triangular, 6-8 × 3-3.5 mm, outside ferruginous pubescent, inside glabrous. Petals greenish white; outer petals oblong-lanceolate, ca. 20 × 8 mm, outside ferruginous pubescent, inside puberulent; inner petals orbicular, to 16 mm, outside pubescent, inside glabrous, apex rounded. Stamens oblong, ca. 2 mm; connectives 3-angular, apex obtuse. Carpels oblong, pubescent; ovules 6 per carpel, in 2 series; styles oblong, pubescent; stigma apex entire. Monocarp stipes ca. 1 cm; monocarps globose, ca. 1.2 cm in diam., densely golden tomentose. Fl. Mar-Nov, fr. Jun-Dec.
A fine strong bast fiber obtained from the inner bark of Fissistigma acuminatissimum is used to make rope in Yunnan.
Forested slopes; 900-2000 m. Guangxi, SW Guizhou, S Yunnan [Vietnam].