Koompassia excelsa

Tualangs grow mostly in lowland rainforests where it towers over the canopy. Like most tall rainforest trees it has huge buttress roots to support it weight. This is because most of the nutriments of rainforests soils are very near the surface, making large spreading roots more effective than deep ones.

Koompassia excelsa, or Tualang (Tapang), is an emergent tropical rainforest tree species in the Fabaceae family. It is found in Indonesia, Malaysia, the Philippines, and Thailand. It is one of the tallest tropical tree species: the tallest measured specimen is 85.8 m or 88 m tall. Tualangs grow mostly in lowland rainforests where it towers over the canopy. Like most tall rainforest trees it has huge buttress roots to support it weight. More

Koompassia excelsa @ Global Biodiversity Information Facility (20) ; Malaysia (2) More