The palm forest tree frog, Leptopelis palmatus, is a species of frog in the family Arthroleptidae endemic to the Príncipe island, in São Tomé and Príncipe. Red tree frog Leptopelis rufus from the African mainland was for a long time included in this species, but is now considered a distinct species.
The palm forest tree frog is a large species: females measure 81–110 mm (3.2–4.3 in) in snout–vent length. The tympanum is large and the feet are fully webbed. The colouring varies, but the dorsum is typically dark green to black, sometimes with many light spots giving the frog a marbled appearance. The ventrum is dark and has a granular surface. Compared to the red tree frog, this species has larger choanae (the apertures where the nasal passages join the throat), larger tympani and differences in skin texture.
