석죽과 Caryophyllaceae

1. 꽃받침잎은 서로 떨어져 있다.

2. 턱잎이 있다.

3. 암술대는 5 개이며 잎은 윤생한다  ····························································································294. 들개미자리

3. 암술대는 3 개이며 잎은 대생한다 ····························································································295. 갯개미자리

2. 턱잎이 없다.

4. 꽃잎은 갈라지지 않고 끝이 오목하거나 가늘게 갈라지거나 또는 없다.

5. 씨방은 다른 부분보다 적은 수의 심피로 되어 있다.

6. 열매끝의 열편 수는 각각 2 개씩 갈라지므로 암술대 수의 배로 된다.

7. 종자에 부속물이 있다 ······································································································· 307. 개벼룩

7. 종자에 부속물이 없다 ······································································································ 벼룩이자리속

6. 열매 끝의 열편은 다시 갈라지지 않는다.

8. 꽃은 끝에 달린다 ········································································································ 나도개미자리속

8. 꽃은 옆에 달린다 ············································································································· 299. 갯별꽃

5. 씨방의 심피수는 다른 부분의 수와 같거나 많다 ················································································ 개미자리속

4. 꽃잎은 깊게 갈라졌다.

9. 폐쇄화와 덩이뿌리가 있다 ············································································································ 개별꽃속

9. 폐쇄화와 덩이뿌리가 없다.

10. 암술대는 5개(간흑 3~4개)이며 꽃받침잎과 대생하고 열매는 원주형이다 ··········································· 점나도나물속

10. 암술대는 3~5 개이며 5 개일 때는 꽃받침잎과 호생하고 열매는 둥글다 ·················································· 쇠별꽃속

1. 꽃받침잎은 합생하며 수술은 하위이고 흔히 씨방병위에 달리며 암술대는 이생한다.

11. 꽃 밑에 소포가 있다 ·····················································································································패랭이꽃속

11. 꽃 밑에 소포가 없다.

12. 열매는 장과이다 ·················································································································· 331. 덩굴별꽃

12. 삭과이다.

13 열매는 1방이다.

14. 암술대는 5 개이다.

15. 꽃받침잎은 잎 같으며 길이 2-3cm 이다 ·················································································296. 선옹초

15. 꽃받침잎은 그렇게 크지 않다 ································································································· 동자꽃속

14. 암술대는 2~3 개이다.

16. 암술대는 2 개이며 삭과 끝의 열편은 5 개이다 ········································································ 330. 대나물

16. 암술대는 3 개이며 삭과 끝의 열편은 6 개이다 ············································································· 장구채속

13. 삭과는 1실이지만 밑에서는 2~5개의 방으로 구분된다.

17. 꽃받침에 10 맥이 있고 암술대는 3 개， 삭과는 3~6 개의 열편으로 갈라진다 ···································끈끈이대나물속

17. 꽃받침에 5 맥이 있고 암술대는 2 개， 삭과는 4 개의 열편으로 갈라진다 ·······································351. 말뱅이나물

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