Do you know in French it is commonly called "la monnaie du pape" (The pope's money/coins"). :D A lady who lived here about 15 years ago loved it and had it growing it everywhere. It has self-seeded itself around the wild hedge by the garden, and I collect seeds and try to spread the love even farther. :) Have you eaten it before? It is part of the brassica family, and everything from root to seeds is edible, albeit unusual in taste.