Brassica campestris subsp. dichotoma (Roxb.) Olsson Dataset Update on the Brassicaceae Species Checklist Rank SUBSPECIES Published in Olsson, G. Hereditas 40: 414. (1954). Classification family Brassicaceae genus Brassica Name Homonyms Brassica campestris var. dichotoma (Roxb.) G.Watt Brassica campestris subsp. dichotoma (Roxb.) Olsson