I have to agree with Ashton about Acoma. Yes, it is your general purple and white plicata, but it always blooms, always increases, and has my favorite scent of all irises. It was neglected for 15+ years at my house, then planted in real garden beds, and has taken off.
I will always have some of it where I live because it was the first iris I had at my house; until I found the Quaker Lady buried under ivy and periwinkle that had been there for decades (a different long story).
Quaker Lady btw is a very fast grower if you want a clump of old form iris for contrast in your garden.
