Wild mustard flower petal surface (Brassica kaber), coloured scanning electron micrograph (SEM). Individual cells show an elaborate surface texture. Wild mustard pollen (Brassica kaber) is a herbaceous flowering plant (also known as charlock or field mustard) in the family Brassicaceae. Other names for this family include the mustards, mustard flowers, the crucifers, or the cabbage family. The importance of this family for food crops has led to its selective breeding throughout history. Some examples of cruciferous food plants are the cabbage, broccoli, cauliflower, turnip, rapeseed, mustard, radish, horseradish, cress, wasabi, and watercress. Magnification: x470 when shortest axis printed at 25 millimetres.