Leaves alternate, estipulate, simple to bipinnate. Flowers perfect, regular. Sepals 4, distinct. Petals 4, distinct. Mustard is prepared from the ground seeds of Brassica nigra, B. juncea and Sinapsis alba.
Mustards are also important as oil crops.
Rapeseed oil, prepared from Brassica napus , has numerous industrial uses. Some members of the family are used as ornamentals. Others are aggressive and weedy. Chemicals in the seeds and foliage of some species are toxic to livestock. Magnoliophyta, Magnoliopsida, Dilleniidae, Malvales Malvaceae-The Mallow Family Malva, Sidelcea, Hibiscus, Gossypium A cosmopolitan family of 75 genera and 1500 species with the center of distribution in the American tropics.