This study reports the floristic survey of holoepiphyte and hemiepiphyte Orchidaceae in Caxiuanã National Forest, located between municipalities of Melgaço and Portel, near the Marajó area, Pará State, Brazil. Four random excursions for collecting fertile material were taken between April 2009 and November 2010. The family is represented by 33 species and 24 genera in Floresta Nacional de Caxiuanã. The most representative genera were Epidendrum, Scaphyglottis, Catasetum, Encyclia, and Polystachya; other genera were represented by only one species each.
Brazilian Amazon; Conservation Unit; Marajó
