Most of the ecoregion is covered in evergreen rain forest, but with several different habitats. Above 700 metres, a special thick evergreen forest-type dominates, and on the southern slopes of the Elephant Mountains, dwarf conifer Dacrydium elatum forests grows. On the Kirirom plateau, Tenasserim pine forest is found. The northern part of Cardamom Mountains is home to the southernmost natural habitats of Betula (species Betula alnoides). Throughout, Hopea pierrei, an endangered canopy tree rare elsewhere, is relatively abundant in the Cardamom Mountains. Other angiosperm tree species are Anisoptera costata, Anisoptera glabra, Dipterocarpus costatus, Hopea odorata, Shorea hypochra, Caryota urens and Oncosperma tigillarium. Other conifers include Pinus kesiya, Dacrycarpus imbricatus, Podocarpus neriifolius, P. pilgeri and Nageia wallichiana.