3) 귀리족 Aveneae

1. 꽃은 모두 같으며 소수에는 각 2개 이상의 결실 소화가 있다.

2. 호영에 용골이 없다.

3. 소수의 길이가 1cm 이상이며 까락은 호영의 중앙보다 위에서 돋는다    ····························································귀리속

3. 소수의 길이가 1cm 이하이며 까락은 호영의 중앙 이하에서 돋는다    ·························································176. 좀새풀

2. 호영에 용골이 뚜렷하다.

4. 소수축에 긴 털이 있으며 소화에 까락이 있다   ····················································································잠자리피속

4. 소수축에 털이 거의 없고 소화에 까락이 없다   ·················································································177. 도랭이피

1. 꽃은 두 종류이며 소수에는 1 개의 결실화와 1~2 개의 헛꽃이 있다.

5. 소수는 3개의 소화로 되어 있다.

6. 밑에 달린 2 개의 퇴화 소화는 결실 소화보다 크다.

7. 퇴화 소화에는 내영과 수술이 있다    ································································································산향모속

7. 퇴화 소화는 적어도 위쪽 것은 수술이 없고 완전한 중성화이다 ··································································향기풀속

     6. 밑에 달린 2 개의 퇴화 소화는 작은 인편이 되어 결실 소화 밑에 달린다   ···························································갈풀속

5. 소수는 2개의 소화로 되어 있다.

8. 위쪽 소화는 수꽃이고 아래쪽 소화는 양성화이다 ························································································· 털새

8. 위쪽 소화는 양성화이고 아래쪽 소화는 수꽃이다   ·············································································178. 개나리새