Cinnabar, Queen Elizabeth, Flordora, etc. R. roxburghii

I remember a few years ago about a fascinating article about these roses, but I can’t find it. Also, how much roxburghii does all these roses have? I remember someone did a test (something to do with acidity). I’m most intrested with Queen Elizabeth because a friend show me his seedling that has flacky bark.

You may be thinking of the HD Wulff article “Notes on the Breeding Behavior of Rosa Roxburghii and Rosa Multibracteata” in the 1954 ARS Annual, 73-77.

Thanks! Bought the book on