Micrantheum is a genus of four species of flowering plant in the family Picrodendraceae and is endemic to Australia.

Plants in the genus Micrantheum are heath-like, monoecious shrubs with simple leaves usually in groups of three, and flowers arranged singly or in small clusters in leaf axils, male flowers with three, six or nine stamens.

The flowers are arranged singly or in small groups in leaf axils with bracts at the base and four or six sepal lobes, the petals often absent.

[2][3][4] The genus Micrantheum was first formally described in 1818 by René Louiche Desfontaines in Mémoires du Muséum d'histoire naturelle,[5] and the first species he described (the type species) was Micrantheum ericoides.

[6] The following is a list of species of Micrantheum, accepted by the Australian Plant Census as of September 2023:[7]