Japan Flora: Shrub with slightly 4-angled glabrous branches; leaves membranous, oblong-lanceolate, 10-18 cm. long, 2.5-3.7 cm. wide, acuminate at both ends, obsoletely serrulate, grayish puberulent on nerves above, densely discoid-glandular beneath, the lateral nerves 12-14 pairs, the petioles about 1 cm. long; cymes axillary, densely many-flowered, about 3 cm. across, the peduncles about 1.3 cm. long; calyx glabrous; corolla about 1 mm. long, puberulent outside; stamens about twice as long as the corolla; fruit about 2 mm. across. Aug.

Kyushu (Mount Takakuma in Osumi); rare.