고란초과 Polypodiaceae

1. 잎에 성모가 있다     ·····························································································································석위속

1. 잎에 털이 있을때는 단모이다.

2. 맥은 서로 떨어져 있다. 만일, 그물맥이 있을때에는 유리맥이 없거나 1 개가 있다.

3. 잎은 깃처럼 갈라지고 육질이 아니다. 포자낭군은 둥글다  ·····································································미역고사리속

3. 잎은 갈라지지 않고 육질이다. 포자낭군은 선형이다   ·············································································버들일엽속

4. 측사는 방패형이 아니다.

5. 잎에는 나엽과 실엽이 있다 ································································································ 206. 콩짜개덩굴

5. 잎은 모두 같다.

6. 포자낭군은 주맥과 가장자리 사이에 1 줄로 달린다 ·········································································· 일엽초속

6. 포자낭군은 흩어져 있다  ······································································································207. 밤일엽

4. 측사는 방패형이다.

7. 포자낭군은 둥글다   ··················································································································손고비속

7. 포자낭군은 길다   ····················································································································· 고란초속