Not arabis androsacea
I hardly dare ask any more, since I have so many misidentified plants around :-) - but here goes. The plant that I've grown for many years, always assuming that it was Arabis androsacea (since that's how the seed it grew from was labeled), looks nothing like the real thing. While it's not a stunner, I like it for its early-spring blooms and its non-intrusive habit: just single rosettes with a single flower stalk. Can you help me put a name to it?