1) 기장족 Paniceae

1. 소수에 가시가 있다 ·····················································································································80. 대청가시풀

1. 소수에 가시가 없다.

2. 소화는 결실한다 ·························································································································· 기장대풀속

2. 소화는 위쪽 것만이 결실한다.

3. 소수 밑에 총포가 없다. 조속의 것은 가지가 퇴화한 것이다.

4. 첫째 포영은 퇴화하지 않는다.

5. 결실 소화의 호영은 딱딱하다   ································································································87. 좀물뚝새

5. 결실 소화의 호영은 딱딱하고 뒷면이 부풀었다.

6. 소수 밑에 까락이 없다.

7. 잎은 적어도 밑에 딸린 것은 선형으로 길며 밑이 줄기를 감싸지 않는다.

8. 꽃차례는 곧은 원추화서이다  ································································································기장속

8. 꽃차례는 중축 양쪽에 달린 짧은 화서지로 되었다 ···········································································피속

7. 잎은 밑의 것이라도 좁은 난형 또는 피침형이며 밑의 잎은 줄기를 싼다  ······································ 96. 주름조개풀

6. 소수 밑에 까락이 있다   ···············································································································조속

4. 제 1 포영은 퇴화하여 거의 없어지고 꽃차례는 대개 총상이다.

9. 결실 소화의 가장자리는 안으로 말리며 대개 딱딱하다.

10. 화서지에 날개가 있고 소수의 등은 편평하다. 둘째포영은 꽃대 축 쪽에 있다 ······································· 94. 참새피

10. 화서지는 선상이고 날개가 없다. 소수의 등은 부풀었으며 둘째포영은 꽃대 축의 반대쪽에 위치한다 ········· 95. 나도개피

9. 결실 소화의 가장자리는 말려들지 않으며 딱딱하다  ···········································································바랭이속

3. 소수밑에 까락 같은 총포가 있으며 소수는 총포와 같이 떨어진다.

11. 총포는 1 개의 까락으로 되었다 ································································································· 81. 물잔디

11. 총포는 많은 까락으로 되었다 ···································································································· 82. 수크령