It's white, blooms in the fall, and is a native. I got it from Josephine at a RU a couple of years ago.
What is this Aster Called?
That would be Drummond's Aster, Symphyotrichum drummondii var. texanum. Big name for a little Aster.
http://www.wildflower.org/plants/result.php?id_plant=SYDRT
Mine are blooming now also.
YES! Thank you!