Bidaria hainanensis (Tsiang) P. T. Li.

Lianas to 3 m, pubescent. Petiole 2-3.5 mm; leaf blade oblong or oblong-elliptic, 3.5-8.5 × 1.5-3.5 cm, membranous or thin papery, adaxially glabrous except for midvein, base rounded to shallowly cordate, apex acute, mucronate; lateral veins 4 or 5 pairs. Cymes ca. 1.5 × 1.5 cm, 20-30-flowered; peduncle 3-7 mm. Pedicel ca. 5 mm. Sepals ovate, ciliate. Corolla campanulate; lobes oblong, ca. 1 × 0.5 mm; tube nearly as long as lobes; appendages absent, hair bands included. Anthers reaching base of stigma head; pollinia oblong, retinaculum half as long as pollinia. Ovaries glabrous. Stigma head capitate. Fl. Aug.

* Dense forests. Hainan.