개갓냉이속 Rorippa SCOP.

1. 총상화서에 포가 없다.

2. 각과는 좁은 선형이며 다소 굽었다   ································································································568. 개갓냉이

2. 각과는 둥글거나 타원형이다.

3. 각과는 장타원형이다 ··············································································································· 569. 속속이풀

3. 각과는 거의 둥글다  ··············································································································570. 구슬갓냉이

1. 총상화서에 포가 있다   ················································································································571. 좀개갓냉이