Stormy- I believe there are a few single-bladed cuts floating around. I've seen a Mikado grow to maturity throwing singles.
It's also a possible mutation when polyploid genes are in play.

The ABC stuff, from what I've read (I want that too, lol!!!!), the mutation is recessive and you'd have to breed it in pretty hardcore from a F2 cross to make it "stick". There HAS been some work done on that. I don't know how to get those genetics though. If anyone knows a source, POST IT!!!!

Stealth- Soma Lavender is pretty darn ornamental, with pretty purple leaves near maturity. Purple Afghani (again, I can't find a source) is purple start to finish. It would look lovely among your hollyhocks