It turns out that most of the healthy dark green veggies we love all trace their roots (hehe) back to the same mustard plant, brassica oleracea. The family includes cabbage, kale, collards, cauliflower, romanesco broccoli, kohlrabi, and brussels sprouts, each variety chosen for certain traits like flower buds, large leaves, and edible stems. And yes, the process is quite similar to breeding puggles to labradoodles.