Glabrous scandent shrubs. Stems terete, green. Leaves simple, opposite, coriaceous; petioles 7-15 mm long, bases connate into a stipular ring at node; blades narrowly elliptic to lanceolate, 6-12 cm long, 1.5-3.5 cm wide, apex acuminate, base acute to round, glabrous on both surfaces, entire, green adaxially and pale green abaxially, venation pinnate, lateral veins 6-9 pairs. Inflorescences axillary, of 3-10-flowered cymes; bracts persistent, linear to triangular, 2-3 mm long; peduncles glabrous, 5-10 mm long. Flowers yellow, slightly pubescent in bud; pedicels glabrous, 5-10 mm long; calyx 5-merous, very widely ovate, ca. 1 mm long and wide, slightly imbricate, margin ciliate; corolla deeply 5-lobed, the lobes lanceolate, 5-6 mm long, 1-1.5 mm wide, ascending to spreading at anthesis; stamens 5, loosely connivent, the anther ca. 3 mm long, the filament ca. 0.5 mm long, dorsifixed; ovary glabrous, 2-locular, style filiform, ca. 6 mm long at anthesis. Fruit 6-8 mm in diameter, glabrous, blackish at maturity.

TAIPEI: Yangmingshan Natl. Park, Peng 12951; Peichatienshan, Li 3538. ILAN: Nanhutashan, Nanshan-Kiretei, Yamzaki et al.692.

Distributed in Japan (Western Honshu and Ryukyu) and southern mainland China. In Taiwan, restricted mainly to evergreen broadleaf forests of Yangmingshan National Park and nearby mountainous areas in the northeastern part of the island, at ca. 600-1,700 m alt.