According to the query of the cultivation help planting network, it is known that there is no difference between mustard and gaiwan, which are the same kind of vegetable, just called differently.

Mustard is an annual herb, plant height of 30-150 cm or so, young stems and leaves with prickly hairs, stems are erect, the basal leaves are broadly ovate to obovate, rounded at the top, the base is cuneate, there are 2-3 pairs of lobes, the edge of the notched or serrated.

Mustard terminal racemes with yellow flowers and yellowish sepals, oblong-elliptic in shape and erect spreading.