I don't know just John INgram found in southern California, but there are quite a number of Delphinium species in both the American West and the dry parts of western Asia that can be considered geophytes. They have tuberous rootstocks. Delphinium nudicaule, which John mentioned, is one of them. I also grow D. luteum, a California species with clear yellow flowers, in the bulb frame, where it seeds like mad, being a typical threatened species; I send seed to the exchanges from it. I've tried some others but was not pleased enough with their flowers to use the frame space for them, and most don't like the winters here. I find D. luteum much more reliable than the other yellow one that is sometimes grown, the Asian D. zalil (or possibly that name has been changed). Jane McGary Northwestern Oregon