Thryptomene micrantha, commonly known as ribbed thryptomene, is a shrub in the family Myrtaceae. The species is endemic to south-eastern Australia. It grows to between 1 and 2 metres in height and produces white flowers between late winter and early summer. The species was first formally described in 1853 by English botanist Joseph Dalton Hooker in Hooker's Journal of Botany and Kew Garden Miscellany. His description was based on a collection made by R.C.