Hi Donald,
Unfortunately, I don't know. I bought it at a little backyard nursery where nothing was labeled. Sadly it was one of the pots of Achimenes that got shoved in a corner over winter and forgotten until really late the next summer. The poor things apparently tried to sprout but gave up and died without sun or water. Boy, did I feel dumb! They are so easy to grow and overwinter that I was beginning to think that it was impossible to kill an Achimenes, but then I found a way!
Whatever variety it was, it had a really nice periwinkle coloration, larger flowers than my others, and started blooming around mid-summer.