Saxifraga arendsii "Purple Rockfoil"
These guys took a beating this winter (their first); lost 3 of 9 starts. The ones that made it are looking a little iffy, but I think by the end of the summer they'll be looking pretty good. They're certainly blooming extensively. I just learned how to use the close-up feature on the camera and viola! The plants are currently ground-cover and the blooms no more than 6" high and maybe a 1/4" in diameter.