고란초속 Crypsinus PRESL

1. 잎은 갈라지지 않으며 중앙부가 제일 넓고 상록성이다   ········································································· 215. 큰고란초

1. 잎은 갈라진다. 갈라지지 않은 것은 밑부분이 제일 넓다.

2. 잎은 갈라지지 않고 밑부분이 제일 넓다. 상록성이다   ··········································································· 216. 고란초

2. 잎은 갈라진다.

3. 잎은 2~3 개로 갈라진다. 상록성이다    ························································································· 216. 고란초

3. 잎은 깃처럼 깊게 또는 완전히 갈라진다. 겨울에 마른다    ······························································· 217. 층층고란초