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Koompassia excelsa

In Singapore: Honey Bee Tree, Tualang, Sialang, Menggaris, Kayu Raja, Tapang, Tualang Bee Tree (Grown in Singapore)

Koompassia excelsa
Photo: Bobbean, CC BY-SA 3.0

Koompassia excelsa is a giant emergent tree of lowland tropical rainforests in Southeast Asia, one of the tallest tropical tree species. It is a tree for forest settings, not a garden or houseplant, so care notes below describe its natural conditions.

Family
Fabaceae (Pea & bean family)
Grows as
Tree
Light
Full sun
Water
Grows in wet tropical rainforest with high rainfall, so soil stays consistently moist in its natural habitat.
Soil
Deep, moist, well-drained lowland rainforest soils rich in surface organic matter.
Temperature
Warm wet tropical conditions, roughly 24 to 32 °C; not frost tolerant.
How easy
Hard
Native range
Thailand to W. & C. Malesia
Climate
wet tropical

About

Koompassia excelsa (known as tualang in Peninsular Malaysia, tapang in Sarawak, mangaris in Sabah, and bangris in Kalimantan) is an emergent tropical rainforest tree species in the family Fabaceae. It is found in Indonesia, Brunei, 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(281 or 289 ft) tall.

These trees grow mostly in lowland rainforests where they tower over the canopy. Like most tall rainforest trees they have huge buttress roots to support their weight. This is because the majority of the nutrients in rainforest soil are very near the surface, making large spreading roots more effective than deep ones.

Other Koompassia plants

Koompassia malaccensis

[Contains information from Leaf Area Index (LAI) and Heritage Trees from data.gov.sg (National Parks Board), made available under the terms of the Singapore Open Data Licence version 1.0]

Text excerpted from the Wikipedia article Koompassia excelsa by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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