The genus Typhonium (Araceae-Areae) in Australasia

The genus Typhonium (Araceae-Areae) is revised for Australasia. Fourteen species are recognised. Two are introduced. Of the twelve indigenous, eleven are endemic to the region. Six aré new to science. Typhonium millarii F.M. Bailey is reduced to synonymy with T. angustilobum F. Muell. Illustrations and distribution maps are provided. Keys are given to the genera of geophytic Aroideae in Australasia and to the species of Typhonium. Apparent affinity between two new Australian Typhonium species and the Indian genus Theriophonum is noted. It is suggested that Australasian representation of Areae is mostly autochthonous and ancient rather than immigrant and comparatively recent in origin.