Agri ClubThe Brassicaenus includes broccoli cabbage cauliflower turnips and radishes.The mustard family also includes plantsrown for their leaves like arugula a number of Orientalreens as well as mustardreens. Three related species of mustard arerown for their seeds: Yello Mustard (Brassica alba or Brassica hirta) is a round hard seed beige or straw coloured. Its light outer skin is removed before sale.With its milder flavour andood preservative qualities this is the one that is most commonly used in ballpark mustard and in pickling.Black Mustard (Brassica nigra) is a round hard seed varying in colour from dark brown to black smaller and much more pungent than the white.