These usually have the green leaves but throw a purple-ish stripe here and there. I dug them up from my Mom who has had them along her walk for as long as I can remember. It seems the older they get, the more purple there is to them.

Impatiens niamniamensis Here is a link that might be useful: Impatiens

I'll cast another vote in favor of gaillardia. I planted Mesa Yellow last year and it was still blooming when the October snowstorm hit. That was the end of it blooming but I'm guessing that may be only due to the fact a huge oak tree limb came crashing down smack on it. It's showing signs of new growth this year despite what the storm did to it. A shorter one is Golden Goblin altho' the one I bought grew as tall as the species. I'm guessing it had the wrong tag in the pot. Q for campanula - don't osteospermums have a short bloom period? Shasta daisy blooms for only a few weeks here.

Here ya go. They are sort of bluish but can turn very purple in the fall and have yellow flowers. We used to have lots of them in AZ where they are quite common. I don't know the cold hardiness but they seem to do well through the frosts. Here is a link that shows what they look like in thier darker purple colors. Don't believe people when they say that they have no thorns..they have those evil little glochids (sp) that get into your fingers and you can't see them- I think those are the worst! lol. ~Lenette Here is a link that might be useful: Santa Rita cactus