Description from Flora of China
Ficus formosana Maximowicz var. angustissima W. C. Ko; F. formosana var. linearis Migo; F. pandurata var. angustifolia W. C. Cheng; F. pandurata var. holophylla Migo; F. pandurata var. linearis Migo.
Shrubs, 1-2 m tall. Branchlets reddish brown, sometimes quickly turning gray, densely puberulent, very rapidly glabrescent. Stipules lanceolate, glabrous, sometimes persistent. Petiole 3-5 mm, sparsely pilose; leaf blade obovate, sometimes violin-shaped with middle constricted, lanceolate, or linear-lanceolate, 4-16 cm, papery, white pubescent when young, abaxially sparsely pubescent on veins and with small cystoliths, adaxially glabrous, base rounded to broadly cuneate, margin entire, apex acuminate to acute and mucronate; basal lateral veins extending 1/3-1/2 length of leaf blade length, secondary veins 3-18 on each side of midvein. Figs axillary on normal leafy shoots, paired, red when fresh, ellipsoid to globose, 4-10 mm in diam., glabrous or minutely scabrid-papillate, base cuneate to obscurely stalked, apical pore navel-like, bracts reddish with paler margin and ± erect; peduncle 4-5 mm, slender; involucral bracts ovate. Male flowers: near apical pore, pedicellate; calyx lobes 4, linear-lanceolate to linear; stamens (2 or)3, unequal. Gall flowers: sessile or pedicellate; calyx lobes 3 or 4, oblanceolate to linear; ovary ± globose; style lateral, very short. Female flowers: calyx lobes 3 or 4, elliptic; style lateral, long, thin; stigma funnelform. Fl. Jun-Aug.
Forests or scrub in mountains. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Henan, Hubei, Hunan, Jiangxi, Sichuan, SE Yunnan, Zhejiang [Thailand, Vietnam].