Brassica rapa
Native to Europe, the plant is a member of the tribe Brassiceae of the Brassicaceae (mustard family). Rapini is classified scientifically as "Brassica rapa var. Ruvo". It is also known as broccoletti, broccoli raab, broccoli rabe, spring raab, and ruvo kale. Turnip and bok choy are a different variety (or subspecies) of this species.