Description from Flora of China
Boea hainanensis W. Y. Chun, Fl. Hainan. 3: 588. 1974.
Herbs, stemless or with stems to 5 cm, pannose, glabrescent. Leaves basal or crowded near stem apex; petiole to 1.5 cm; leaf blade oblanceolate to obovate, 5-18 X 1.2-6 cm, leathery, adaxially glabrous to glabrescent, abaxially brown cobwebby-woolly, base attenuate to cuneate, margin crenulate to serrate, often involute, apex rounded to acute; lateral veins 5-9 on each side of midrib. Cymes axillary; peduncle 12-30 cm, brown woolly, glabrescent; bracts 2(or 3), narrowly lanceolate to lanceolate, 3-10 X 0.5-1 mm, outside brown woolly. Pedicel 1-4 cm. Calyx 5-sect from base; segments lanceolate to ovate, 1.5-2 X ca. 0.5 mm, outside glandular puberulent to pubescent. Corolla bluish to deep purple, 0.8-1.2 cm, outside glandular puberulent; tube ca. 4 mm; adaxial lip lobes ca. 6 X 5 mm; abaxial lip ca. 1 cm, abaxial lip lobes 4-6 X ca. 5 mm. Filaments 4-6 mm, glabrous; anthers 2-3 mm; staminodes apparently absent or 1, minute. Ovary ca. 4 mm, puberulent. Style ca. 5 mm, glabrous. Capsule spirally twisted, 3-4.5 cm, glabrous. Fl. and fr. Jul-Sep.
* Shady and damp rocks under mixed forest; ca. 800 m. Hainan.