미나리아재비속 Ramunculus LINN.

1. 수과에 주름이 없고 꽃은 황색이다.

2. 수과는 다소 부풀며 길이 1 ~2.5mm 이다.

3. 2년초이다 ··························································································································400. 개구리자리

3. 다년초이다.

4. 뿌리는 방추상이고 수과에 털이 없다 ··························································································401. 개구리갓

4. 뿌리는 굵어지지 않는다.

5. 수과에 털이 없다.

6. 줄기의 털은 퍼졌다 ··································································································· 402. 미나리아재비

6. 줄기의 털은 누웠다 ··································································································· 애기미나리아재비

5. 수과에 짧은 털이 밀생한다 ···························································································403. 왜미나리아재비

2. 수과는 다소 편평하고 길이 2.5~4mm로서 때로 가장자리에 편평한 테두리가 생긴다.

7. 지상으로 뻗어가는 포복지가 있다. 꽃은 지름 15~22mm, 꽃잎은 도란형이고 꽃받침은 젖혀지지 않는다 ·················· 404. 기는미나리아재비

7. 포복지가 없다. 꽃은 지름 6~12mm, 꽃잎은 좁은 도란형이고 꽃받침은 젖혀졌다.

8. 과탁은 길이 6~10mm, 취과는 타원형 내지 장타원형이다 ·······························································405. 젓가락나물

8. 과탁은 길이 1 ~5mm, 취과는 둥글다.

9. 수과는 윗가장자리만이 편평하고 줄기에 누운 털이 있거나 적다 ················································· 406. 왜젓가락나물

9. 수과의 가장자리는 편평하여 테두리가 생기고 줄기에 퍼진 털이 었다.

10. 잎은 1~2회 3출, 정소엽은 도란형 내지 장타원형이다 ······················································ 407. 털개구리미나리

10. 잎은 2회 3출, 정소엽은 쐐기형 내지 도피침형이다 ·····························································408. 개구리미나리

1. 수과는 말랐을 때 옆으로 달린 주름이 있고 수중식물이며 꽃은 희다.

11. 꽃턱에 긴 털이 있다. 수과와 턱잎에 보통 털이 있다 ············································································409. 매화마름

11. 꽃턱에 털이 없다 ················································································································ 409+. 민매화마름