three main varieties of mustard are grown

In general, three main varieties of mustard are grown worldwide for use.

• White mustard seeds (Brassica alba): The seeds are light straw yellow colored and are slightly larger than the other two varieties. White seeds exhibit mild pungency.
• Black mustards (Brassica nigra): The seeds are commonly seen in South Asia. The seeds are sharp and more pungent than other two varieties.
• Brown mustards (Brassica juncea): The seeds are native to sub-Himalayan plains of Northern India.