Petersianthus quadrialatus (also called toog and Philippine rosewood) is an emergent tropical rainforest tree species in the Lecythidaceae family.

A deciduous, medium to very large rainforest tree species that grows up to 40–60 m tall and 80-100 (occasionally -250-370) cm in diameter at breast height.

Currently known tallest Petersianthus quadrialatus growing near national highway, in the outskirts of San Francisco town, Alegria municipality in the northeastern part of Mindanao island.

[4] Petersianthus quadrialatus is endemic to the part of the southeastern Philippines - Mindanao, Panay, Leyte, Samar, Negros, Masbate and surrounding smaller islands.

Tree is fairly common and grows scattered in primary and secondary tropical rainforest, near riverbanks or on hillside, in swampy and cool places.