The tag in the pot was a mispelling... and I think this is actually Centradenia inequateralis although I am not sure of this. This is apparently a tender annual in Canadian zone 5??? It is somewhat creeping, likes full sun, fleshy but not a succulent, and I am not sure if its in Onagraceae or not. Its obviously a southern US spp?

Our datebase shows Centradenia inaequilateralis but there are no pictures. You could browse through the Centradenias and see if anything looks like yours. The flowers appear correct.

That is a gorgeous flower.

Ah, thanks! Its very happy in it pot in the sunshine. Im going to get seed if i can and bring it in this winter.