Hi Lauw! It's great to hear from you again. Yes, I do have an affection for this double form of O. pes-caprae, even though I generally prefer the appearance of single flowers. It also has quite distinctive foliage, free of that mottling that appears on the single form. So, it appears we have two members, both in France, who agree with me that the double form is non-invasive. It's too bad you lost O. perdicaria (lobata). I'll take a look at my own resources and let you know. You may have snowstorms to contend with; I have chaparral rats! Andrew San Diego