Rapistrum perenne is a species of flowering plant in the mustard family[1][2] commonly known as the perennial bastard cabbage.

[2] It is natively found between east, central, and southeast Europe and the Caucusus, but has also been introduced to a number of other European countries.

[1] It was first collected in 1922 from southeastern Saskatchewan, but has not been seen there since 1932; it was introduced to North America, but unlike Rapistrum rugosum did not persist as a naturalized population.

[3]