Calytrix simplex is a species of plant in the myrtle family Myrtaceae that is endemic to Western Australia.
The shrub typically grows to a height of 0.15to. It usually blooms between October and December producing purple star-shaped flowers.
Found on ridges and sand plains in a scattered area from the Swan Coastal Plain extending inland into the Wheatbelt where it grows in sandy lateritic soils.
There are two known subspecies: