The Brassicas have received too little attention from botanists. The inevitable outcome of such neglect or of any superficial study is a reduction of species, and in this direction Brassica has suffered greatly. The most perplexing species in our manuals are those which contain the greatest number of old types or synonymous names. It is true that this is supposed to be primarily due to the variation of the species or groups, but it is often to be charged to superficial study or insufficient material. Our manuals contain too few rather than too many species of Brassica; at all events, the miscellaneous dumping of rutabagas, turnips, rape and other plants into Brassica campestris is unnatural, and, therefore, unfortunate.