Homoranthus decasetus is a plant in the myrtle family Myrtaceae and is endemic to a small area in central Queensland.

It has small, thin leaves and flowers that fade to purple as they age.

Homoranthus decasetus is an upright shrub that typically grows to a height of 2 m (6 ft 7 in).

The flower are arranged singly on short branchlets in leaf axils.

[2][3] Homoranthus decasetus was first formally described in 1981 by Norman Byrnes from a specimen collected in Isla Gorge in 1977 and the description was published in Austrobaileya.