a deciduous shrub occurring on somewhat damp slopes in forests in
hilly districts, grows as tall as one meter. Leaves are opposite;
blades are 10-22cm long, 3-6cm wide, long oblong to narrow long
oblong, with tips pointed long, bases cuneate, sharp serrations on
margins, thin texture, and addressed hairs on both surfaces. Branch
tips emerge 5-10cm long cymes; ornamental flowers' calyxes are white
and almost circular, 1-2.5cm in diameter, with prominent reticular
veins which remain until fruiting time. In the center of the
ornamental flowers are bisexual flowers plus sterile flowers of the
same size; petals are white, 8-10cm long, oval, with pointed tips.
Bloom time: July-August.