Herbs twining. Stems slender, to 1 m, with 2 well-defined lines of hairs. Petiole ca. 5 mm, minutely hirsute to glabrescent; leaf blade linear, ca. 6 cm × 3 mm, minutely hirsute then glabrescent except for densely hairy adaxial side of midrib, base obtuse, apex acute; lateral veins slightly elevated. Inflorescences few flowered. Pedicel ca. 4 mm. Sepals ovate-triangular, ciliate. Corolla subrotate, ca. 8 mm in diam.; lobes oblong-ovate, ca. 3 × 1.5 mm, obtuse, glabrous outside, pubescent inside. Pollinia globose, horizontal. Fl. Jan.

* Thickets. Taiwan.