Paniculata Hydrangeas in Azabu Juban

In early June I came across these beautiful white Paniculata Hydrangeas (or PeeGee) in Azabu Juban.  I wasn't really sure if they were in fact hydrangea because of the cone shaped bloom.  Most hydrangea that I am familiar have blooms that are ball shaped. 

Nikon 16-35mm f/4G ED VR II AF-S IF SWM @ 32 mm, f5.6, ISO 200, 1/320 sec.