Acmena is a genus of shrubs and small trees in the myrtle family Myrtaceae. They are related to guavas. The name is derived from the Greek word for "plentiful."
It is a fairly recent creation, being split off from Eugenia, along with the closely-related Syzygium.
There are 15 species; six are endemic to Australia, and a seventh occurs there. The remaining species are native to Malesia.
The Australian species are commonly labelled as lilly pillies, along with the Australian Syzygiums
Acmena is used as a food plant by the larvae of some Lepidoptera species including Aenetus ligniveren, which burrows into the trunk.