x.. 낚시사초절

1. 과포는 다소 편평하고 전체가 잔 젖꼭지 같은 돌기로 덮여있다.

2. 포엽에는 잎집이 없다 ············································································································· 333. 대택사초

2. 포엽에 긴 잎집이 있다 ············································································································· 334. 동백사초

1. 과포는 편평하지 않고 3모형이며 젖꼭지 같은 돌기가 없다.

2. 소수는 1 개씩 달린다.

3. 웅소수, 인편 및 밑부분의 잎집은 자갈색 또는 적갈색이다.

3. 소수는 단성이며 과포에 부리가 있다.

4. 웅소수, 자화영 및 밑부분의 옆집은 자갈색 또는 적갈색이다.

5. 잎 · 잎집 및 꽃줄기는 털이 있거나 물기가 있다.

6. 식물체에 털이 있다.

7. 포는 밑이 통형이고 잎새가 없으며 과포는 길이 4~5mm 이고 밖으로 굽은 부리가 있다    ·····················335. 털사초

7. 포는 볕이 열려 있고 과포는 길이 5~6mm 이며 부리는 곧고 포에 잎새가 있다  ·······························336. 털잎사초

6. 식물체에 젖꼭지 같은 돌기가 있다.

5. 식물체에 털이 없다.

8. 지하경이 길다.

9. 자소수는 다소 서고 자루가 잎집 안에 들어 있다    ····································································337. 집사초

9. 자소수는 긴 자루 끝에서 밑으로 처진다    ···········································································339. 장성사초

8. 지하경이 없다    ·············································································································340. 낚시사초

4. 식물체는 전체가 녹색이다.

10. 잎은 너비 5~10mm 로서 백록색이며 키는 50cm 이상이다  ················································ 342+. 넓은잎보리사초

10. 잎은 너비 5mm 이하이고 키는 30cm 이하이다   ········································································342. 보리사초

3. 적어도 측소수는 자웅성이다.

11. 잎은 넓은 선형이며 너비 4-7mm로서 늘어진 것처럼 보이며 뒷면이 희고 정소수는 웅성이다     ················343. 지리대사초

11. 잎은 장타원상 피침형 또는 피침형이며 너비 1~2cm로서 뒷면은 희지 않다.

12. 정소수는 자웅성이며 잎 가장자리가 깔깔하고 과포에 털이 없다     ·····················································344. 대사초

12. 정소수는 웅성이며 잎에 잔털이 있고 과포에 털이 있다   ·······························································345. 털대사초