I think y'all are referring to Symphyotrichum oblongifolium which is commonly called fall aster or aromatic aster. You might try searching for it under that name. I had it here in the yard, but the last several years have been tough for it. I dug some out of a bar ditch some years ago. Now I'm not seeing it growing anywhere. Since it's a native plant, I'm hoping it will make a return at some point. It was never widespread in this area - just a clump growing here and there.
I really think there are some surviving remnants where I had it growing, but it's not caught enough breaks to bloom. I've been careful to not disturb the spot, so it's grown up with native grass and weeds. It will manage those better than any cultivation I might do.