mystery flowering plant

hello,
can anyone tell me what kind of flowering plant this is?
It grows very tall over 9 ft. attracts hummingbird moths at night.

 

this plant also has bluish purple seed clusters when mature.

 

I'm not sure what the plant is, but since insects are so important to plants, I searched for the moth and found a good site for moths and other insects.
http://whatsthatbug.com/clearwing_moth.html

 

thank you,
as far as I know the moth in the picture is a tiger hummingbird moth.