Curious if anyone knows anything about the origins or possible species derivation of this pretty well established wallflower: it has been propagated and sold by various wholesale nurseries in recent years: it's been pretty long lived and long blooming for me and very showy (as you can see from the accompanying pix). I am quite fond of it, and wondered if it is allied to E. helveticum which it resembles a bit (only the latter is always yellow in my experience). It seems to be sterile: I've never found viable seed.
