A Euonymus of some sort, I think.

It is Phlox paniculata. A garden staple for most.

Well fascinating, Buglossoides arvensis (Corn Gromwell) is not native...but is at least apparently one of the richest natural plant-based sources of omega-3 SDA (stearidonic acid) known. Of which the body converts (SDA) to EPA at a rate of up to 30%, compared to a typical conversion rate of ALA (alpha-linolenic acid found in most plants) of 3-6%. So, it's essentially a surprising little superfood plant that carries many benefits, despite being an import.

Ah, Amsonia ciliata (Bluestar)...looks like a great match. Thanks!