This eastern European introduction has established itself mostly in southern England particularly round London. There is a significant outpost in Edinburgh but is is infrequent elsewhere.

It is a plant of rough ground and waste places like many yellow crucifers. The wartiness refers to the little bumps on the fruits which can just about be seen in the photo.

Most records for this plant are from the south east of England with the rest dotted about mostly in England. There is little in Wales and Scotland and none in Ireland.