Premna japonica Miq. Nakai Verbenaceae Deciduous shrub, of slow growth in Europe, much branched, becoming a small tree in its habitat. Leaves opposite, very variable in shape, ovate, elliptic or obovate, margin entire or lobed to serrulate on the upper half. Inflorescences in terminal panicles. Small tubular yellow flowers 8-10 mm long with a purplish spot in the throat.
Fruit globose dark purple.