The mustard that we typically eat as a condiment or greens are Sinapis alba, Brassica juncea, and Brassica nigra, which are in the same family as Brassica olera

The mustard that we typically eat as a condiment or greens are Sinapis alba, Brassica juncea, and Brassica nigra, which are in the same family as Brassica oleracea, but they aren't the same species.