Japan Flora: Small glabrous branched deciduous shrub 10-20 cm. high, the stems 2-4 mm. across at base, the branches green becoming gray-brown in age, acutely 4-angled; leaves thinly membranous, ovate to broadly so, 1-2 cm. long, 7-13 mm. wide, acute, mucronate, vivid green when dried, serrulate, sparingly puberulent on the nerves, very short-petioled; flowers with the leaves, solitary, the pedicels glabrous, short; calyx-teeth short; corolla greenish white, urceolate, 4-5 mm. long; berry globose, red. May-June. Coniferous woods;

Honshu (centr. distr. and Kanto); rare.