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Range DescriptionGnetum arboreum is reported only from the Sierra Madre Mountains on Luzon Island, Philippines (Markgraf 1930). The type was found at Mt. Binuang in the province Quezon (Foxworthy 1911). Merrill (1925) lists additional findings from the same mountain range with localities further north in the provinces Rizal and Nueva Ecija. He also reports that these collections by Ramos and EdaÃ±o are climbers and not trees, as it was reported for G. arboreum. It might therefore be necessary to evaluate the taxonomic identity of these collections since other species of Gnetum occur on Luzon Island.