尖药兰属（学名：Diphylax）是兰科下的一个属，为陆生兰。该属仅有尖药兰（Diphylax urceolata）一种，分布于印度和中国云南。

The genus Platanthera belongs to the subfamily Orchidoideae of the family Orchidaceae, and comprises about 100 species of orchids. The members of this genus, known as the butterfly orchids or fringed orchids, were previously included in the genus Orchis, which is a close relative (along with the genus Habenaria). They are distributed throughout the temperate regions of the Northern Hemisphere. They are terrestrial and have tubercules.