열당과 Orobanchaceae

1. 꽃은 긴 꽃자루 끝에 달리고 꽃받침은 한쪽이 깊게 갈리진다 ·········································································375. 야고

1. 꽃은 줄기 끝에 두상，총상 또는 수상으로 달린다.

2. 수술은 꽃부리 밖에 나타난다.

3. 꽃은 꽃자루가 없고 꽃받침은 찌그러진 접시형이며 화반이 없다   ··············································· 376. 오리나무더부살이

3. 꽃은 꽃자루가 있고 꽃받침은 종모양이며 화반이 있다     ······································································377. 개종용

2. 수술은 꽃부리 밖에 나타나지 않는다.

4. 꽃은 수상으로 달라고 꽃받침은 일부 붙어 있다     ···············································································378. 초종용

4. 꽃은 두상으로 모여달리고 꽃받침은 완전히 떨어져 있다  ······························································ 379. 가지더부살이