Black mustard (Brassica nigra) is a tall, many branched, often weedy-looking annual plant. It often reaches six feet and may occasionally double that height. Lower leaves are supported by petioles.

Black mustard (Brassica nigra) is a plant native to Africa, Asia, and Europe. Its seed is used to flavor condiments for food. Its also used as medicine. Black mustard contains chemicals that might reduce pain but might also be irritating.

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