Hydrangea arborescens 'Annabelle'

Flowers extremely large, pure white with few fertile. Originated usa, pre-1978.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Cornales
family       Hydrangeaceae
genus        Hydrangea L.
species         Hydrangea arborescens L.