Hydrangea radiata

About

Hydrangea radiata is a deciduous shrub up to 3 m (9.8 ft) tall in the flowering plant family Hydrangeaceae. Its natural range is limited to the southern Appalachians, where it is fairly common. Its common names—silverleaf hydrangea or snowy hydrangea—reflect its distinctive foliage which is dark green on top and silvery white below; the sharply contrasting foliar colors makes this shrub conspicuous at a distance, especially in a breeze.

Summary from Wikipedia