A synopsis of the genus Hydriastele (Arecaceae)

Abstract

As a result of recent molecular systematic research, generic delimitation within a clade of four palm genera in subtribe Arecinae (Arecaceae: Arecoideae: Areceae) is reappraised. Due to the polyphyly of Gulubia and Gronophyllum, and the position of Siphokentia and Hydriastele within the clade, the four genera are here reduced to a single, more broadly defined genus, Hydriastele. The rather uniform morphology of the group supports this taxonomic change. A synopsis of the 48 currently accepted species is provided, including 34 new combinations, two new names and one new species, H. boumae W. J. Baker & D. Watling.