From what I can tell you won't get a positive ID from that photo. They are so much alike you will have to make close examination of the blooms and maybe the corms. Liatris mucronata is a synonym for Liatris punctata. You will have to wade through a lot of technical terms, but here is a key for
Liatris.
http://www.efloras.org/florata...
What county are you in Lila?
