Description: Probably the commonest yellow-flowered crucifer of waste and marginal ground, and common as an arable weed. Far commoner than the related Sinapis alba.

All names: Sinapis arvensis L.; Brassica arvensis (L.) Rabenh., non L.; Brassica sinapis Vis.; Sinapis kaber (DC.) L.C.Wheeler

Distribution Map from NBN: Sinapis arvensis at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Sinapis arvensis at iNaturalist World Species Observations database.