what is the name of this flower?
and are there other similarly "constructed" flowers?
When was it blooming and where was it photographed? Do you have other pictures of it not so close up?
Here is a link that might be useful: Astragalus
Viccia cracca or similar is probably more likely in the East Coast area.
Here is a link that might be useful: Viccia cracca
Yes a vetch (Viccia) is what came to my mind as well.
Thanks so much! Vetch, or Viccia, is I think the name I'm looking for.
Note that you have two separate plants in the picture: a Campanula of some species and the Tufted Vetch (Viccia cracca)