What kind of flower is this? What's its name? Its flowering period is a little long, just like Osmunda japonica.

Coriaria hydrangea (scientific name: hydrangea? D. Don): shrub or small tree, 2-3 meters high, sometimes up to 10 meter; Branches are cylindrical, slightly with four blunt edges, densely covered with yellow-white short strigose and granular scales, and the bark is brown. The leaves are papery, oblong, with short-pointed irregular serrations at the edges, which are sparse and rough. Umbrella cymes are 15-25 cm in diameter, with curved top, scattered branches and thick length. Petals ovoid, 2-2.5 mm long, sharp at the top and truncated at the base. Capsule altar-shaped. Seeds brown, broadly elliptic or suborbicular. The flowering period is from August to September, and the fruiting period is10-165438+1October.