Description from Flora of China
Ficus bonatii H. Léveillé; F. nigrescens King.
Woody vines, prostrate, 0.3-0.4 m tall. Young branchlets occasionally straight, with long and thin adventitious roots, nodes enlarged. Stipules lanceolate, ca. 5 mm, pubescent. Petiole 1-2(-6) cm; leaf blade obovate-elliptic, 2-8 × 1.5-4 cm, thickly papery, base rounded to shallowly cordate, margin shallowly toothed, apex acute; basal lateral veins short; secondary veins 3 or 4 on each side of midvein, abaxially with fine hairs among veins, adaxially with short spinose hairs. Figs axillary on procumbent stem, paired or clustered usually at least partly underground, dark red when mature, globose to ovoid, 1-2 cm in diam., surface with rounded tubercles, basally attenuated into a short stalk, sessile; involucral bracts thin. Male flowers: near apical pore; calyx lobes 2-6; stamens 1-3. Female flowers: shortly pedicellate; calyx lobes absent; ovary covered by a sticky membrane; style persistent, lateral, long; stigma 2-lobed. Achenes ovoid-globose, tuberculate. Fl. May-Jun, fr. Jul.
Wastelands, grassy banks, rock crevices; 800-1400 m. S Gansu, Guangxi, Guizhou, Hubei, Hunan, S Shaanxi, Sichuan, SE Xizang, Yunnan [NE India, Laos, N Vietnam].