5. 통꽃식물목 Tubiflorales

1. 꽃부리 열편은 규칙적으로 갈라져 있다.

2. 암술대는 끝에 달린다.

3. 잎은 보통 호생한다.

4. 대부분이 덩굴성이며 열매는 삭과이다 ·········································································· 메꽃과 Convolvulaceae

4. 덩굴성이 아니다.

5. 씨방은 3 실이다 ································································································ 꽃고비과 Polemoniaceae

5. 씨방은 3실이 아니다.

6. 씨방은 성숙할때 4 개로 갈라진다.

7. 수술은 5 개이며 심피는 2 개이다  ········································································· 지치과 Borraginaceac

7. 수술은 4 개 또는 2 개이다   ················································································ 마편초과 Verbenaceae

6. 씨방이 성숙할 때 4 개의 소진과로 갈라지지 않는다    ···························································가지과 Solanaceae

3. 잎은 대생한다      ··································································································쥐꼬리망초과 Acanthaceae

2. 암술대는 밑에 달리며 씨방은 갚게 갈라져 있다    ······················································································· 지치과

1. 꽃부리 열편은 불규칙하게 갈라져 있다.

8. 씨방은 성숙할 때 종자가 1 개씩 들아 있는 소견과로 갈라진다.

9. 수술은 5 개이다   ·····························································································································지치과

9. 수술은 2~4 개이다

10. 암술대는 정생한다   ···················································································································마편초과

10. 암술대는 저생한다   ·········································································································꿀풀과 Labiatae

8. 씨방은 성숙할 때 소견과로 갈라지지 않는다.

11. 씨방상위이다.

12. 기생 또는 식충식물이다

13. 녹색식물이 아니고 뿌리에 기생하는 식물이다    ·····························································열당과 Orobanchaceae

13. 식충 수생식물이다     ·····························································································통발과 Lentibulariceae

12. 녹색식물로서 기생 또는 식충식물이 아니다.

14. 심피는 2 개이다.

15. 열매에 가시 또는 활 같은 부속체가 있다    ···································································참깨과 Pedalidaceae

15. 열매에는 보통 가시 같은 것이 없다.

16. 수술은 5 개다    ···················································································································가지과

16. 수술은 2-4 개이다.

17. 꽃밥은 보통 떨어져 있다.

18. 증축태좌이다.

19. 초본성이다    ·······················································································현삼과 Scrophulariaceae

19. 목본성이다  ·························································································· 능소화과 Bignoniaceae

18. 측막태좌이다 ············································································································ 능소화과

17. 꽃밥은 2개씩 붙은 것 같거나 붙어 있다.

20. 종자는 태좌 돌기에 붙어 있다 ·····················································································쥐꼬리망초과

20. 종자는 이처럼 달리지 않았다   ·······································································괭이귀과 Gesneriaceae

14. 심피는 1 개이고 수술은 4 개이다   ···············································································파리풀과 Phrymaceae

11. 씨방하위이다 ····························································································································· 괭이귀과