单侧花属（学名：Orthilia）是鹿蹄草科下的一个属，为草本植物。该属共有2种，分布于欧洲、亚洲和非洲。

Orthilia secunda is a flowering plant of the genus Orthilia in the family Ericaceae. It is the only member of the genus. Its common names are sidebells wintergreen, one-sided-wintergreen and serrated-wintergreen, and it was previously part of genus Pyrola, the wintergreens.