포아풀속 Poa LINN.

1. 1 ~2년초이다.

2. 첫째 포영은 3 맥이며 잎은 너비 3~7rnm 이다 ················································································ 157. 큰꾸러미풀

2. 첫째 포영은 1 맥이다.

3. 원추화서는 밋밋하고 내영에 털이 있다 ·························································································158. 새포아풀

3. 화서지는 깔깔하고 내영에 거미줄 같은 털이 있다.

4. 잎혀는 길이 1 ~1.5mm 이고 소수는길이 3~4.5rnm 이다 ··································································· 159. 구내풀

4. 잎혀는 길이 1.5rnm이다.

5. 줄기의 밑부분이 특히 굵지 않다 ····························································································160. 실포아풀

5. 줄기의 밑부분이 염주알같이 굵다   ····················································································160+. 마디포아풀

1. 다년초이다.

6. 화수에 살눈이 없다.

7. 잎집은 옆으로 편펑하다.

8. 잎혀는 길이 0.2mm 이며 첫째포영은 2.2mm 이하이고 1맥이 있다 ·························································· 우산포아풀

8. 잎혀는 길이 1mm이며 첫째포영은 2~3mm이고 보통 3맥이 있다.

9. 소수는 길이 4~6mm이며 내영은 길이 3.5 mm이고 5맥이 있다······················································ 161. 가는포아풀

9. 소수는 길이 3~Smm이며 내영은 길이 2.5mm이고 5맥이 있다  ························································ 162. 좀포아풀

7. 잎집은 옆으로 편평하지 않다.

10 잎혀는 길이 2.5mm 이상이며 얇다.

11. 식물체는 키가 30 cm 이하이다.

12. 소수는 길이 6-5mm 이고 잎은 너비 4-5mm 이다 ································································ 163. 두메포아풀

12. 소수는 길이 3-4.5mm 이고 잎은 너비 2-3mm 이다 ······························································ 작은관모포아풀

11. 식물체는 키가 50 cm 이상이다.

13. 잎은 너비 4rnm 이상이고 잎혀는 1-3mm이다.

14. 잎은 너비 5-10mm 이다·····························································································164. 좀꾸러미풀

14. 잎은 너비 3-5mm 이다 ······························································································165. 큰새포아풀

13. 잎은 너비 3mm 이하이다.

15. 잎은 너비 1.5-3mm 이고 소수는 길이 4mm 이다  ·································································· 166. 포아풀

15. 잎은 너비 1-2mm 이고 소수는 길이 3-6mm 이다    ······························································· 167. 눈포아풀

10. 잎혀는 길이 2mm 이하이다.

16. 소수는 길이 3~·4mm이며 첫째포영은 1.5-2mm로서 1맥이 있고 잎은 너비 3.5-6mm 이다     ···················시베리아포아풀

16. 소수는 길이 4.5-5mm이다.

17. 줄기는 편평한 편이다 ·····································································································168. 왕포아풀

17. 줄기는 앞과 다르다.

18. 첫째포영은 길이 1.5mm로서 1맥이 있고 잎은 너비 4mm이다    ··············································· 169. 갑산포아풀

18. 첫째포영은 2mm 이상으로 3 맥이 있고 잎은 너비 2mm 이다     ················································170. 청포아풀

19. 잎혀는 밑부분 이외에는 털이 없다

20. 잎혀는 길이 0.3mm 이고 소수는 길이 4.5 mm 이며 꽃은 1~2 개씩 달리고 잎은 너비 1.3mm이다  ········171. 섬포아풀

20. 잎혀는 길이 0.6mm이고 소수는 길이 4mm이며 꽃은 3~4개씩 달리고 잎은 너비 3mm 이다 ············· 관모포아풀

19. 잎혀는 가장자리 근처에 털이 있다.

21. 소수는 길이 3~5mm이고 첫째 포영은 2.5~4mm로서 3맥이 있고 잎집과 잎에 털이 있다   ·········172. 금강포아풀

21. 소수는 길이 4.5mm 이상이다.

22. 소수는 길이 3~5mm이고 첫째 포영은 3mm로서 3맥이 있으며 잎혀는 길이 4mm 이다   ············173. 선포아풀

22. 소수는 길이 3~4mm이고 첫째 포영은 2.6mm로서 3맥이 있으며 잎혀는 길이 2.5mm 정도이다  ·········174. 자주포아풀

6. 화수에 살눈이 있다 ·················································································································175. 살눈포아풀