胡麻草属（学名：Centranthera）是玄参科下的一个属，为直立、粗糙草本植物。该属共有7种，分布于印度、马来西亚至大洋洲。

Pleurothallis, abbreviated Pths in horticultural trade, is a genus of orchids commonly named bonnet orchids. The genus name is derived from the Greek word 'pleurothallos', meaning 'riblike branches'. This refers to the rib-like stems of many species.