There was some discussion on one of the iris lists recently about
Belamcanda chinensis. Here it is blooming in my garden in 2007. Seed
grown, it has proved hardy for 5 years through winters of up to -45C.
It did grow and increase this year, but no bloom. Too cold and wet a
season for it, I guess.
BJ in SW MB, Canadian Prairies, Zone 2b/3ish