Styphelia stomarrhena (common name - red swamp cranberry)[2] is a species of flowering plant in the family Ericaceae and is endemic to the south-west of Western Australia.

It is a low, spreading or compact shrub with narrowly elliptic, sharply-pointed leaves and red, tube-shaped flowers usually arranged singly in leaf axils.

[3] This species was first described in 1845 by Otto Wihelm Sonder who gave it the name Astroloma stomarrhena in Lehmann's Plantae Preissianae from specimens collected near the Swan River Colony by James Drummond.

[6] The specific epithet (stomarrhena) means "male mouth", referring to the stamens projecting from the petal tube.

[7] Red swamp cranberry is found in the IBRA regions of southern Geraldton Sandplains and northern Swan Coastal Plain bioregions, with some occurrences in the Avon Wheatbelt and Jarrah Forest bioregions, on deep sandy soils or sand on laterite, in Banksia woodland or heathland communities.