쌍잎난초속  Listera R. BR.

1. 순판기부에 귀 같은 돌기가 있고 가장자리에 작은 돌기가 없으며 줄기에 선모가 있다······································ 710. 털쌍잎난초

1. 순판기부에 돌기가 없고 가장자리에 젖꼭지 같은 작은 돌기가 있다  ···························································· 711. 쌍잎난초