World Library  
Flag as Inappropriate
Email this Article

Agathis orbicula

Article Id: WHEBN0009549363
Reproduction Date:

Title: Agathis orbicula  
Author: World Heritage Encyclopedia
Language: English
Subject: Flora of Brunei, Trees of Borneo, Agathis
Publisher: World Heritage Encyclopedia

Agathis orbicula

Sarawak kauri
Scientific classification
Kingdom: Plantae
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Araucariaceae
Genus: Agathis
Species: A. orbicula
Binomial name
Agathis orbicula
de Laub.

Agathis orbicula (Sarawak kauri) is a coniferous tree native to the island of Borneo — in Brunei, Kalimantan-Indonesia, and Sabah-Malaysia.

It is found scattered throughout tropical rainforests and Kerangas forests. It is commonly found on hills and plateaus. The species is facing a high risk of extinction due to its scattered distribution and the decline in quality of its habitat.


  • Description 1
    • Cones 1.1
    • Bark 1.2
    • Timber 1.3
  • Sources 2
  • External links 3


Agathis orbicula is a medium-sized tree of up to 40 metres (130 ft). Like all Agathis, Sarawak Kauri is generally possessed of a large, straight trunk. The trunk is usually branchless until close to the top where branches are retained which form a globular crown.

The leaves range in shape from ovangular to circular, and are glacous on their underside. The leaves are roughly two by three centimetres; juvenile leaves are much larger by comparison and are roughly twice the size of adult leaves. It can be inferred that the tree is similar in its appearance to other large trees of the genus, particularly Agathis borneensis. This is because it is likely A. orbicula was mistaken for A. Borneensis.


The cones that the tree produces are approximately seven by five centimetres and display imbrication whilst the pollen cones are generally twelve by five millimetres, being quite small and having a bumpy texture due to the exposed microsporophylls. The cones are among the smallest in the Agathis genus when compared to the significantly larger pollen cones of other species such as Agathis robusta; its cones are in the millimetre range making them quite small.


The bark is described as being a deep brown and flaking off of the tree in irregular pieces and plates; it is also smooth and shiny. The underside of the bark is a reddish-brown colour with a granular texture and accompanied by a yellow resin produced by the sap of the tree.


The wood of the Sarawak Kauri is generally particularly straight-grained, and the colour of the timber beneath can range from a straw colour to reddish-brown. It produces an attractive timber that is easily worked. However, due to an extreme scarcity and a loss of habitat the tree does not seem to be in use or ever have been used for commercial purposes.


External links

  • Agathis orbiculaGymnosperm Database:
  • Agathis orbicula description
  • AgathisGymnosperm Database:

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.