물매화속 Parnassia LINN.

1. 헛수술의 위쪽은 잘게 갈라지고 끝에 둥근 선체가 있다   ········································································· 656. 물매화

1. 헛수술의 위쪽은 3-5 개(7 개)로 갈라지고 열편은 짧으며 끝이 둥근 선체로 되지 않는다 ······························ 657. 애기물매화