Description from Flora of China
Boea dictyoneura Hance, J. Bot. 21: 169. 1883; B. hancei C. B. Clarke.
Subshrubs or herbs, stemless or with stems to 10 cm, pannose, glabrescent. Leaves basal or crowded near stem apex; petiole (absent or)1-4 cm; leaf blade oblanceolate, rarely obovate, 7-19 X 2-8 cm, thick papery, adaxially woolly, glabrescent, abaxially pannose, base attenuate to cuneate, sometimes ultimately rounded, margin irregularly serrate to dentate or subentire, involute, apex acute to rounded; lateral veins 5-10 on each side of midrib. Cymes axillary; peduncle 8-21 cm, pannose to sparsely pannose, glabrescent; bracts 2(or 3), lanceolate to narrowly oblong, 5-13 X 2.5-3 mm, outside pannose. Pedicel 0.5-2 cm. Calyx 5-sect from base or near base; segments linear to narrowly triangular, 3-6 X 0.3-1 mm, outside woolly. Corolla purplish, 1.2-1.5 cm, outside glabrous; tube 6-7 mm; adaxial lip lobes 4.5-6 X ca. 5 mm; abaxial lip ca. 8 mm; abaxial lip lobes 3-6 X 6-8 mm. Filaments 6-7 mm, glabrous; anthers ca. 3.5 mm; staminodes 3, 2-4.5 mm. Pistil glabrous; ovary ca. 6 mm. Style ca. 4 mm. Capsule spirally twisted to nearly straight, 1.5-6 cm, glabrous. Fl. Jan-May, fr. May-Jun.
Rocks in forests; 100-800 m. NW Guangdong, Guangxi (Lingui Xian) [Thailand, Vietnam].