4. 용담목 Gentianales

1. 식물체에 유액이 없다.

2. 큰나무 또는 관목이다.

3. 수술의 수는 꽃부리 열편의 수보다 적다 ············································································ 물푸레나무과 Oleaceae

3. 수술의 수와 꽃부리 열편의 수는 같다 ··················································································· 마전과 Logaruaceae

2. 초본식물이다.

4. 암술대는 1 개 이다 ········································································································ 용담과 Gentianaceae

4. 암술대는 2 개로 갈라져 있다 ··············································································································· 마전과

1. 식물체에 유액이 있다.

5. 수술대는 붙지 않고 암술머리는 1 개이다 ·············································································· 협죽도과 Apocynaceae

5. 수술대는 서로 붙어있고 암술머리는 2 개이다 ··································································· 박주가리과 Asclepiadaceae