Pachystoma, commonly known as kunai orchids or 粉口兰属 , is a genus of two species of flowering plants in the orchid family, Orchidaceae. They are deciduous, terrestrial herbs with one or two linear, pleated or veiny leaves and more or less drooping flowers which do not open widely, on a thin, wiry flowering stem. Species in this genus are found in tropical and subtropical Asia to Australia and islands of the southwest Pacific Ocean.