콩짜개난속 Bulbophyllum THOU.

1. 위구가 없으며 잎은 길이 7~13mm이고 맥이 희미하다 ············································································740. 콩짜개난

1. 장란형의 위구가 있으며 잎은 길이 1~3.5cm이상이고 주맥이 뚜렷하다 ·························································· 741. 혹난초