Sleumer Leucopogon oliganthus is a species of flowering plant in the heath family Ericaceae and is endemic to the south-west of Western Australia.

It is an erect, open shrub with white, tube-shaped flowers from August to November.

[2] It was first formally described in 1904 by Ernst Georg Pritzel in Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie from specimens collected between Moora and Dandaragan.

[3][4] The specific epithet, oliganthus, derives from the Greek: oligos ("few" or "scanty") and anthos ("flower") to give an adjective describing the plant as having "few or small flowers".

[5] Leucopogon oliganthus grows in sandy soil with lateritic gravel on sandplains and dunes in the Avon Wheatbelt, Geraldton Sandplains, Jarrah Forest and Swan Coastal Plain bioregions of south-western Western Australia, and is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.