협죽도과 Apocynaceae

1. 초본식물이다.

2. 잎은 호생한다 ···························································································································· 136. 정향풀

2. 잎은 대생한다 ···························································································································· 개정향풀속

1. 목본식물이다.

3. 덩굴식물이다    ·······························································································································마삭줄속

3. 곧추 자라는 관목이다 ···················································································································· 141. 협죽도