Herbs glabrous except for interior of corolla and sometimes petiole. Stems to 3 m. Petiole 2-4 mm; leaf blade obovate to orbicular, 1-2 × 0.7-1.5 cm, base cuneate or obtuse, apex shallowly emarginate; lateral veins obsolete. Inflorescences 1-5-flowered; peduncle 0.5-3 mm. Flowers white. Pedicel 2-3 mm. Sepals ovate, ca. 1 × 0.5 mm. Corolla 4-6 mm; lobes triangular-acuminate, 2-2.5 × 0.8-1 mm, thickened and villous adaxially at middle. Corona lobes anchor-shaped, apex truncate. Anther appendages oblong-triangular, shorter than corona lobes; pollinia oblong, erect. Stigma head discoid, mucronate at apex. Follicles linear, 4-5 cm × 3 mm. Fl. Apr-May.

* Thickets; low to middle elevations. Taiwan.