Beginner Gardening: could someone id this plant?, 0 by bifdiehl

bifdiehl wrote:
Good morning!
I'm so glad I found this site. I purchased this plant because it reminds me very much of a wild plant that's in bloom now that I see growing along the roadsides here in Pennsylvania. I'm not sure if this domesticated plant is the same thing I see growing, but does anyone know what this pictured plant is? I searched through three books looking for it and couldn't find anything to exactly match - kind of close to some pictures of phlox??
Thanks and any help is much appreciated!!