In Borneo, all three species occur as small populations confined to podsolised soils on ridgetops at about 700–1000 m altitude (at the transition between lowland and montane forest) or to some facies of ‘kerangas’ forest (heath forest). In the Malay Peninsula, Pogonotium ursinum has been found in lowland dipterocarp forest. The highly reduced inflorescence nestling between the two auricles makes this a distinctive and unusual rattan genus.(J. Dransfield & N. Uhl & C. Asmussen & W.J. Baker & M. Harley & C. Lewis, Genera Palmarum. The evolution and classification of palms. 2008)/Palmweb.