The name Stylidium leptocalyx Sond. has been misapplied for many years. This trigger plant is now recognised to be of restricted distribution in the wandoo country south-west of York, and is characterised by pink flowers with linear calyx lobes, arranged in a loose, corymb-like raceme. Stylidium stenosepalum E.Pritz. is reinstated to account for the northern sandplain entity previously known as S. leptocalyx. This species differs from S. leptocalyx in possessing white flowers with a longer corolla tube and column. Amended descriptions and floral images are provided for both species, along with the morphologically-allied S. scabridum Lindl.