Abstract
Orania Zipp. (Oranieae: Arecoideae: Arecaceae) is a genus of solitary, single stemmed tree palms consisting of 28 species, of which 11 species are new and described for the first time in this paper. The genus has an interesting disjunct distribution, with 25 species found in Malesia and three species confined to Madagascar. The 11 new species, O. bakeri A. P. Keim & J. Dransf., O. dafonsoroensis A. P. Keim & J. Dransf., O. deflexa A. P. Keim & J. Dransf., O. ferruginea A. P. Keim & J. Dransf., O. grandiflora A. P. Keim & J. Dransf., O. littoralis A. P. Keim & J. Dransf., O. longistaminodia A. P. Keim & J. Dransf., O. subdisticha A. P. Keim & J. Dransf., O. tabubilensis A. P. Keim & J. Dransf., O. timikae A. P. Keim & J. Dransf. and O. zonae A. P. Keim & J. Dransf. are found in New Guinea. A determination key is produced and detailed descriptions provided for all taxa.
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