사초과 Cyperaceae  (Lee, 2014)

1. 암꽃은 과포로 싸여 있다······································································································사초아과 Carieoicleae (2)

2. 과포는 주머니같이 생겼고 갈라지지 않았다······························································································사초속

2. 과포의 한쪽이 밑까지 갈라진다 ································································································ 378. 좀바늘사초

1. 암꽃은 과포로 싸여 있지 않다 ··························································································방동사니아과 Cyperoideae (3)

3. 소수는 중앙 이상이 가장 넓고 중앙 이상의 인편 몇 개에만 꽃이 달린다.

4. 1 소수 중에서 1 개는 양성화이며 열매 밑에 반이 없고 보통 침 같은 화피가 있으며 열매를 맺는 꽃은 액생한다.

5. 열매를 맺는 꽃은 수꽃 위쪽에 달린다···················································································382. 층층고랭이

5. 열매를 맺는 꽃은 수꽃이나 불완전화보다 밑에 달린다 ···································································고양이수염속

4. 꽃은 단성이며 암꽃은 소축끝에 달리고 열매 밑에 반이 있다 ·································································너도고탱이속

3. 소수는 많은 꽃이 달리며 중앙 이하가 가장 넓고 모든 인편에 꽃이 달리며 원칙적으로 양성화이다.

6. 소수의 인편은 모두 같으며 나선상으로 배열한다.

7. 암술대와 씨방 사이에 마디가 있으며 암술대는 밑부분이 굵다.

8. 바늘처럼 퇴화한 화피가 있으며 화수는 1 개뿐이고 밑에 잎이 없는 잎집이 있다

·····································································································································올방개속

8. 화피가없다.

9. 암술대는 밑부분이 다소 남는다 ······················································································· 모기골속

9. 암술대는 밑에서 떨어진다 ··························································································· 하늘지기속

7. 암술대와 씨방사이에 마디가 없다.

10. 소수가 성숙하면 긴 솜털이 자란다 ························································································ 황새풀속

10. 소수는 성숙해도 솜 같은 털이 자라지 않는다.

11. 화피 열편은 바늘 같거나 간혹 없다 ······················································································고랭이속

11. 화피 열편은 2 개이며 식물체에 털이 없다 ········································································· 439. 세대가리

6. 가장 밑의 인편은 다른것과 다르며 인편은 거의 두줄로 배열한다.

12. 소수축은 관절로 끊어지지 않으며 열매는 3 릉형 또는 앞뒤로 편평하다 ···················································방동사니속

12. 소수축은 관절로 끊어진다 ···································································································· 458. 파대가리

38. 사초과 Cyperaceae (Lee S., 1997. 한국식물검색집)

1. 꽃은 單性花로 되어 있고, 암꽃은 果苞로 싸여있다(사초아과).

2. 果苞는 갈라지지 않는다. ---------------------------------------- 1. Carex 사초속

2. 과포는 밑부분 까지 갈라진다 ---------------------------- 2. Kobresia 좀바늘사초속

1. 꽃은 兩性花 또는 가끔 단성화이고, 과포로 싸이지 않는다(방동산이아과).

3. 小穗에 몇개의 꽃이 달리며 중앙이상의 鱗片에만 꽃이 달린다.

4. 꽃은 단성, 암술은 소지 끝에 달린다 ------------------------ 3. Scleria 너도고랭이속

4. 꽃은 적어도 1개는 양성, 액생.

5. 여러 마디 여러개의 꽃이 액생, 산방화서, 키 1-2m.

암술이 수술보다 위에 달림 ----------------------------- 4. Cladium 층층고랭이속

5. 소수 꽃을 갖는 소수가 액생, 또는 정생, 키 10-90cm.

암술이 수술보다 아래에 달림 ---------------------- 5. Rhynchospora 고양이수염속

3. 소수에 많은 꽃이 달리며 모든 인편에 꽃이 달린다.

6. 鱗片이 두줄로 배열하고 소수 편평 ------------------------- 6. Cyperus 방동사니속

6. 인편이 나선상으로 배열하고 소수 원형.

7. 화주 기부가 굵어지고, 화주과 瘦果 사이에 마디가 있다.

11. 花穗는 1개, 葉身은 없다. 花被는 刺毛狀 -------------------- 7. Eleocharis바늘골속

11. 화수 1-여러개. 엽신 있다. 화피가 없다.

12. 花柱는 宿存 ---------------------------------------- 8. Bulbostylis 모기골속

12. 화주는 早落 -------------------------------------- 9. Fimbristylis 하늘직이속

7. 화주는 가늘고, 화주와 瘦果 사이에 마디가 없다.

8. 花被는 많은 綿毛를 가져 성숙후 小穗는 털방망이처럼 된다 -- 10. Eriophorum 황새풀속

8. 화피는 많은 면모를 가지지 않으며 성숙후 소수는 털방망이처럼 되지 않음.

9. 花被片은 6개, 刺毛狀 ----------------------------------- 11. Scirpus 고랭이속

9. 화피편은 2-3개 인편, 난형.

10. 花序는 3개 -------------------------------------- 12. Lipocarpha 세대가리속

10. 화서는 1개 ---------------------------------------- 13. Kyllinga 파대가리속