Description from Flora of China
Oxyspora balansae (Cogniaux) J. F. Maxwell var. baviensis (Guillaumin) J. F. Maxwell.
Shrubs, 1-2(-4) m tall. Stems terete or obtusely 4-sided to subterete, densely setose and puberulous, glabrescent or glabrous when older; branches numerous. Petiole 1.5-3(-4.5) cm, densely setose and puberulous; leaf blade ovate, 10.5-22 × 4.5-11 cm, stiffly papery to papery, abaxially densely setose or puberulous, adaxially glabrous or very sparsely strigose, secondary veins 2 on each side of midvein, base rounded to subcordate, margin minutely denticulate, apex long acuminate. Inflorescences terminal, narrowly paniculate cymose, 9-17 × 1.5(-3) cm, densely patently setose and puberulous. Pedicel 1-2 mm. Hypanthium narrowly funnelform, 3-4 mm, furfuraceous. Calyx lobes 4, broadly triangular, ca. 1 mm. Petals 4, pink and lavender, broadly ovate to ovate, ca. 3 mm, oblique, apex acute. Stamens 8, inclined to one side; anthers as long as filaments; connective inflated at base, shortly spurred. Ovary inferior, ovoid, apex 8-setose. Capsule broadly ovoid to globular, 3-4 × ca. 3 mm; hypanthium 4-4.5 mm, longitudinally 8-ribbed, furfuraceous; calyx lobes broadly triangular. Fl. Nov-Jan, fr. Nov-Apr.
Thai material of Allomorphia setosa Craib (correctly named Oxyspora howellii if placed in the genus Oxyspora, as was done by Renner et al., Fl. Thailand 7(3): 459. 2001) differs from Chinese material of A. baviensis in the longer and much stiffer pubescence of the entire plant. The Chinese gatherings identified as A. setosa in FRPS (53(1): 168. 1984) do not match the Thai material, but fit well with the type and more recent gatherings of A. baviensis.
Mixed forests, woodland margins, moist places; 500-2000 m. Guangxi, Yunnan [Thailand, Vietnam].