Micromyrtus uniovulum is a species of flowering plant in the family Myrtaceae and is endemic to a small area in the south-west of Western Australia.

Micromyrtus uniovulum is a low, spreading, sometimes erect shrub that typically grows to a height of up to 40 cm (16 in).

[2] Micromyrtus uniovulum was first formally described in 2002 by Barbara Lynette Rye in the journal Nuytsia from specimens collected near Bunny Road in 1999.

[2][3] The specific epithet (uniovulum) means "one egg" and refers to the species having only one ovule in the ovary.

[2] This species is found on the lateritic rises in a mall area west of Three Springs in the Avon Wheatbelt and Geraldton Sandplains bioregions of south-western Western Australia.