Tee, I don't know for sure, they are div and pass along plants. I'll take pictures this year. I remember one I have since my grandmother died, it was in her front yard back in the 1920's we have a Mothers Day picture of that generation with my mother in a tram and the peony in the background. Fluffy white with bright purple streak, it probably is imperial? I don't have any old iris that have names either, but just like the roses and daffodil that stubbornly continue to come up to show us where there was once an old house they have proved to be very hardy.
