Brassica napus Rape

Brassica napus is a conspicuous, yellow-flowered, annual or biennial crucifer. It occurs as 2 separate subspecies in Britain, Brassica napus subsp. oleifera (Oil-seed rape) and Brassica napus subsp. rapifera (Swede). Both have been recorded in West Glamorgan (see separate descriptions). Brassica napus is an allotetraploid species derived from Brassica oleracea and Brassica napus and it is unknown in the wild except as an escape from cultivation.

Neophyte