고사리과 pteridaceae

1. 포자낭군은 포막이나 잎가장자리로 덮여있다.

2. 포자낭군은 포막으로 덮여있다.

3. 포자낭군은 2 개 이상의 엽맥 끝에 걸쳐서 달린다.

4. 잎은 1 회 우상복엽이다 ······································································································· 52. 비고사리

4. 잎은 3-4 회 우상복엽이다 ································································································· 53. 바위고사리

3. 포자낭군은 엽맥끝에 1 개씩 달린다.

5. 포자낭군은 잎가장자리에 달린다 ······························································································ 황고사리속

5. 포자낭군은 뒷면 안쪽에 달린다 ····························································································· 돌잔고사리속

2. 포자낭군은 뒤로 말린 잎 가장자리로 덮여있다.

6. 포낭군은 뒤로 말린 잎 가장자리로 덮여있지만 가장지리에 달리지는 않는다.

7. 포자낭군은 엽맥 끝에 달린다 ····························································································· 부싯깃고사리속

7. 포자낭군은 엽맥 끝이 연결된 맥끝에 달린다.

8. 근경과 잎에 인편이 없다 ······································································································· 55. 고사리

8. 근경과 잎에 인편이 있다.

9. 포자낭군이 달린 열편은 너비가 2 mm 이하이므로 양쪽 포막이 서로 겹친다 ······························· 65. 선바위고사리

9. 열편은 너비가 3mm 이상이어서 양쪽의 포막은 떨어져 있다 ···························································봉의꼬리속

6. 포자낭군은 뒤로 말린 잎 가장자리에 달린다 ···················································································공작고사리속

1. 포자냥군은 밖에 노출되어 있다.

10. 포자낭군은 엽맥 끝에 달리며 둥글다 ··························································v··································54. 점고사리

10. 포자낭군은 측맥에 달리며 길다.

11. 잎은 길이 10cm 내외로서 여러 세포로 된 털이 있으며 근경에 인편이 없다 ············································· 66. 좀고사리

11. 잎은 길이 1m 내외로서 털이 없거나 다소 있으며 근경에 인편이 있다 ····················································고비고사리속