ornamental shrub ID - Hydrangea-like

Is this Hydrangea arborescens?? It was photographed in early September.

 

probably H. macrophylla 'lacecap'

 

According to my knowledge both Hydrangea macrophylla and Hydrangea arborescens have opposite leaf arrangement. The shrub in question has whorled.
http://www.hort.uconn.edu/plants/h/hydmac/hydmac1.html
http://www.hort.uconn.edu/plants/h/hydarb/hydarb1.html

 

correct - Hdrangea has opposite leaves. The flower in this case advanced the suggestion that Susan G was correct. Susan's united in error!

Sundrop, do you have an explanation or a guess about the id?

 

Could be Hydrangea paniculata

 

Whorls of 3 leaves is a fairly common minor mutation in opposite-leaved plants; I'd not attach great significance to it.

 

So in your opinion it is not Hydrangea paniculata despite that it looks like that?

 

I fear I'm not familiar enough with Hydrangea paniculata to tell either way - it isn't often grown around here. I was just making a general observation about opposite-leaved plants.

 

looking again at the flowers I think it's probably H. paniculata. The flowers look panicle-like, pyramidal or ovoid (which is characteristic of H. paniculata) rather than corymb-like, flat-topped or slightly convex (https://gobotany.newenglandwild.org/dkey/hydrangea/#c2)
Thank you all for your comments.