Syzygium acre is an understory rainforest tree in the family Myrtaceae that is endemic to New Caledonia.
Syzygium acre is a pachycaul "palmoid" tree which grows up to in height. It usually has a single trunk, but may have two or three vertical branches with a rosette of enormous leaves at the top of each, with each leaf growing to in length by wide. The young leaves and the flowers are pinkish; the flowers are cauliflorous (i.e. growing directly from the trunk) and are about long, and pendant. The fruit is dark purple and fibrous.
, this species is regarded as endangered by the IUCN due to the species being restricted to a very small area in Grande Terre (the main island of New Caledonia), and threats to its habitat imposed by bushfires and feral pigs. The current population size is not known.