Phebalium microphyllum is a species of small, rounded shrub that is endemic to Western Australia.

The five sepals are about 1 mm (0.039 in) long, joined for half their length and covered with rust-coloured scales on the outside.

The petals are elliptical, about 3.5 mm (0.14 in) long with rust-coloured scales on the back.

[5][6] Phebalium microphyllum grows on undulating plains between Lake Grace and the Fitzgerald River National Park.

[2][3] This phebalium is classified as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.