Brassica

Comparison Chart for Species of Brassica and Sinapis

Character	*Brassica juncea*	*Brassica napus*	*Brassica nigra*	*Brassica rapa*	*Sinapis arvensis*
distinct radicle ridge present	usually (see below)	rarely	rarely	usually (see below)	no
surface texture	finely reticulate with large, shallow interspaces	finely reticulate	coarsely reticulate with small, deep interspaces	finely reticulate	finely reticulate
hilar region	see fact sheet	see fact sheet	see fact sheet	see fact sheet	see fact sheet

Note: It may not be possible to distinguish some of these species (e.g., B. napus and B. rapa) based on the seed alone.