Tetratheca affinis is a species of plant in the quandong family that is endemic to Australia.
The species grows as an erect, open and leafless shrub to 10âÂÂ70 cm (occasionally up to a metre) in height. The pink-purple flowers appear from August to November.
The species occurs within the Avon Wheatbelt, Esperance Plains, Jarrah Forest, Mallee and Warren IBRA bioregions of south-west Western Australia. The plants grow on slopes, flats and swamp edges with sandy and lateritic soils.