Phymatocarpus is a genus of flowering plants in the family Myrtaceae and is endemic to the south-west of Western Australia.

Plants in the genus Phymatocarpus are shrubs which grow to a height of 1–3 metres (3–10 ft).

The flowers are arranged in almost spherical heads on the ends of the branches and have 5 oval sepals, 5 petals and up to 75 stamens.

[2][3] The genus was first described in 1862 by the Victorian government botanist, Ferdinand von Mueller in Fragmenta Phytographiae Australiae.

All species of Phymatocarpus are classified as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.