Darwinia leiostyla is an erect shrub in the family Myrtaceae and is endemic to the south-west of Western Australia. It typically grows to a height of 0.3–1.5 m and has linear leaves up to about 10 mm (0.39 in) long crowded along the branches. Pendent, bell-shaped, flower-like inflorescences appear from May to January. These are clusters of small flowers surrounded by larger pink, red or white, petal-like bracts.