사철란속 Goodyera R BR.

1. 꽃은 3-12개 이다.

2. 꽃차례에 긴 꽃자루가 있으며 줄기의 윗부분에 털이 밀생한다.

3. 꽃받침잎은 길이 4-5mm이고 순판안에 털이 없다 ··············································································716. 애기사철란

3. 꽃받침잎은 길이 7-10mm이다.

4. 잎은 짙은 자록색이며 중앙에 흰 무늬가 있다 ···················································································717. 털사철란

4. 잎은 짙은 녹색이며 흰 무늬가 있다  ·································································································718. 사철란

2. 꽃차례에 대가 없고 잎에 연속하여 꽃이 드문드문 달리며 꽃차례에 작은돌기가 있다········································· 719. 섬사철란

1. 꽃은 1~3개로서 긴 통상이며 길이 2.5-3cm이고 대가 없는 꽃차례에 달린다  ··············································· 720. 붉은사철란