Mustard head is the root of Brassica juncea in panicum miliaceum, Brassicaceae. Mustard head has the shape of ellipse, oval, inverted oval, needle, etc. Its epidermis is usually emerald green, yellow green or green.
Chinese scientific name: mustard head
Nicknames: kohlrabi, mustard, spicy vegetable, mustard head, pimple, pimple head and children's vegetable.