Cuphea

 

This is a Cuphea and I have forgotten where I got it,but I do know I have had it for several years. It is a hardy thing as I do not pay it much attention until it flowers. And it is a late bloomer, giving some variety to all those mums. The Cuphea has many members and a big variety of forms. This one resembles one I grew several years ago as a potted plant which was called cigar plant. The flowers were smaller and orange with a red tip (cigars).Apparently the deer do not find it too palatable as they just tasted a few flowers on the end of the bloom spike and moved on. I also have a cuphea know as bat flower that has the purple tube and two large (compared to the tube) red ears or wings on the end. See one here
This one does not grow as well for me, perhaps disliking my careless ways toward it and seems to get smaller every year.
Mexican heather is also a member of this group.
For a look at some of the diversity of this group put in Cuphea in the search engine and look at images.