It seems my girls are based on a couple of fairytale characters.
These two sisters; Snow White and Rose red, I knew from a book of Grimm Brothers fairy stories, as a child. Its not very popular and I thought I might have dreamedit all until I found this Ladybird Book version in a charity shop recently. I have told my girls about the story as they have grown up, but they just thought I was as crazy as usual. Still, we have always had one little red rose bush and one white in our garden.