herbaceous flower id

could someone help me identify these three plants? thank you.

 

The second one I think is Butterfly pea. it goes by the unflattering name of Clittoria ternata

 

The 3rd looks like Buttonbush
Cephalanthus occidentalis
The 1st may be New York IronWeed
Vernonia noveboracensis

 

You are right on. Thanks so much. The 2nd one that pierrot suggested is butterfly pea does look just like it. I read that it is hardy to zone 10-11 and I am zone 7. This plant is located in a nature area maintained by our parks. Either it has naturalized or this isn't the correct plant since I know for certain it wasn't planted by someone. Thanks for the replies.

 

Butterfly Pea grows from New york to Florida, west to Texas and out and up to Missouri and Iowa.

 

great! thanks. It even comes back every year?

 

Clitoria ternatea is a tropical member of the genus. There are temperate members as well. The one pictured is likely Clitoria mariana.

And Pierrot...that's an unflattering name? ;-)

 

Thanks Ginger Blue.