I have grown RFK since it was introduced. It is certainly a distinctive daylily and needs no tag for identification. It grows very well in my zone 5 garden with no mulch and has increased well. I have found it to be both pollen and pod fertile. The scapes hold the flowers well and do not bend. Unfortunately, I think it's already been used too much in hybridizing.
Rose F. Kennedy
Seedling from Rose F. Kennedy