What's the name of this flower?

Hydrangea cone, a shrub or small tree of Saxifragaceae, with dark reddish brown or grayish brown branches, initially pilose, then hairless, with concave stripes and round light lenticels. It grows in valleys, sparse forests on hillsides or bushes on ridges.

Shrubs or small trees, 1-5 meters high, sometimes up to 9 meters. Leaves papery, 2-3 opposite or whorled, ovate or elliptic, apex acuminate or acute, base rounded or broadly cuneate, with dense slightly curved serrations at the edge. Thymus is tower-shaped, with many sterile flowers and white flowers. Pregnant calyx tube gyro-shaped, petals white. The capsule is round. The flowering period is from July to August, and the fruiting period is10-165438+10.