凹舌兰属（学名：Coeloglossum）是兰科下的一个属，为陆生兰。该属共有2种，分布于北温带。

Coeloglossum is a genus of orchid. It has long been considered to have only one species, Coeloglossum viride, the frog orchid. Some recent classifications regard Coeloglossum as part of the larger genus, Dactylorhiza, so that C. viride becomes Dactylorhiza viridis. Other sources continue to keep Coeloglossum viride separate.