Brassica arvensis can refer to:
Brassica arvensis Hablitz, a synonym of Brassica rapa L. Brassica arvensis L., a synonym of Moricandia arvensis (L.) DC., purple mistress Brassica arvensis (L.) Rabenh., a synonym of Rhamphospermum arvense (L.) Andrz. ex Besser, field mustard