Mustard is a yellow-flowered plant that can be found throughout the world. The plants most commonly refered to as mustard are usually one of several plants belonging to the genus Brassica. The most common of the 40 or so species of mustard include white mustard (Brassica alba), black mustard (Brassica nigra), brown mustard (Brassica juncea) and field mustard (Brassica campestris). Mustard is very widespread and can be found throughout Asia, Europe and North America. All four of the aforementioned mustard species can be found in California alone! For more on mustard, go to the information and pictures sections of this site. For more information about this site, go to the about section.