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Useful Tropical Plants

Eusideroxylon zwageri

Teijsm. & Binn.

Lauraceae

+ Synonyms

Eusideroxylon borneense Fern.-Vill.

Common Name: Borneo Ironwood

Eusideroxylon zwageri
The buttressed trunk
Photograph by: tian yake
Creative Commons License
Eusideroxylon zwageri Eusideroxylon zwageri

General Information

Borneo ironwood is a slow-growing, evergreen tree that can reach a height of 40 - 50 metres. The straight bole can be clear of branches for up to half of the tree's height, and up to 150 - 220cm in diameter[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
,
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. The bole has many small, rounded buttresses that give the base an elephant-foot like appearance[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
The tree is widely exploited in the wild for its valuable timber, which is one of the heaviest and most durable timbers of South-East Asia[
310
Title
Plant Resources of Southeast Asia
Publication
 
Author
 
Website
http://proseanet.org/
Publisher
 
Year
0
ISBN
 
Description
Lots of information on the uses of the plants of SE Asia.
].
This species is one of the most renowned timbers of Borneo, the decline of which was first noted in 1955[
338
Title
IUCN Red List of Threatened Species
Publication
 
Author
 
Website
http://www.iucnredlist.org/
Publisher
 
Year
0
ISBN
 
Description
A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
]. Population reduction, caused by overexploitation and shifting agriculture, has been noted in several areas[
338
Title
IUCN Red List of Threatened Species
Publication
 
Author
 
Website
http://www.iucnredlist.org/
Publisher
 
Year
0
ISBN
 
Description
A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
]. Regeneration in logged-over forests is limited and so far the species is only planted on a small scale because the supply of seeds and seedlings is inadequate[
338
Title
IUCN Red List of Threatened Species
Publication
 
Author
 
Website
http://www.iucnredlist.org/
Publisher
 
Year
0
ISBN
 
Description
A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
]. The tree has therefore been classified as 'Vulnerable' in the IUCN Red List of Threatened Species(2009)[
338
Title
IUCN Red List of Threatened Species
Publication
 
Author
 
Website
http://www.iucnredlist.org/
Publisher
 
Year
0
ISBN
 
Description
A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
].

Known Hazards

The large fruits are poisonous[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
,
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].

Botanical References


Range

Southeast Asia - Malaysia, Indonesia, Philippines.

Habitat

Generally found in lowland areas of primary forest from around sea level to elevations of 400 metres, in flat or sloping terrain, and also occurs in old secondary forest[
349
Title
Global Tree Campaign - 40 Species in Trade
Publication
 
Author
 
Website
http://www.unep-wcmc.org/trees/trade/40_species_in_trade.htm
Publisher
 
Year
0
ISBN
 
Description
Information on the habitats, uses and some cultivation notes for 40 species of timber trees.
].

Properties

Conservation StatusVulnerable
Medicinal Rating *
Other Uses Rating *  *  *  *
HabitEvergreen Tree
Height35.00 m
Growth RateSlow
Cultivation StatusWild

Cultivation Details

A plant of the lowland, moist tropics, where it is found at elevations up to 625 metres. It grows best in areas where annual daytime temperatures are within the range 20 - 30°c, but can tolerate 10 - 38°c[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. It prefers a mean annual rainfall in the range 2,500 - 4,000mm, but tolerates 2,000 - 4,500mm[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Seedlings require some shade, while older trees need plenty of light[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. Prefers well-drained soils in valleys or on hillsides or even low ridges when soil moisture is sufficient[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Prefers a pH in the range 5 - 6, tolerating 4.5 - 6.5[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Trees may begin to flower at an age of 15 - 20 years[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
They bear fruits at irregular intervals, often every 2 - 3 years, sometimes annually. Fruits ripen within 3 months after flowering. Seed dispersal is apparently often by water; rich pockets of ulin forest are often found at places where the fruits wash ashore in large quantities along rivers[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
Plants can coppice freely[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].

Edible Uses

None known

Medicinal

The pulverized fruits have been used medicinally as a treatment against swellings[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Some caution is advised, especially if the fruits are taken internally - see notes above on 'Known Hazards'.

Other Uses

The heartwood is yellowish-brown to reddish-brown when freshly cut, but it becomes silvery brown, dark brown or almost black on exposure; the sapwood is sharply differentiated from the heartwood and bright yellow when freshly cut, darkening to yellowish-brown on exposure[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Freshly cut wood has a fresh, slightly lemon-like odour[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The wood is very heavy; straight grained, occasionally slightly interlocked; texture moderately coarse and even[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The wood can be sawn with good result, but it blunts sawteeth fairly rapidly, owing to its hardness; the sawteeth should be kept clean from accumulating oily deposits[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Because it tends to split in the radial plane when screwed or nailed, the wood must be pre-bored[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The easy splitting in radial direction makes the wood excellent for making shingles, although sometimes pieces of wood with interlocked grain may cause problems[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The wood is difficult to glue with synthetic adhesives; furniture, for instance, often fails at glued joints[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The wood is rated as very durable. Graveyard tests with stakes showed an average service life in contact with the ground of 17.5 years under tropical conditions[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Stockades and posts have been reported to last over 100 years, and pepper (Piper nigrum L.) support posts and shingles over 30 years. A life of up to 20 years can be expected in marine works[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The wood is resistant to termite attack, although after long periods of exposure attack may occur. Ambrosia beetle attack is rare, but the wood is more commonly attacked by longicorn beetles, and the sapwood also by powder-post beetles. The wood is very resistant to wood-rotting fungi. The heartwood is extremely resistant to preservative treatment[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
One of the heaviest and most durable timbers of South-East Asia. As such, it is preferably used in marine constructions such as pilings, wharfs, docks, sluices, dams and ships (keels, ribs and decking), or in heavy constructions such as bridges, power line poles, masts, piles and house posts[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. It is also used for the traditional houses ('longhouses') of the Dayak in Borneo[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Another major use is for roof shingles ('sirap') which are reported to last 50 years to more than a century[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Less important is its use as frame, board, for heavy duty flooring, floodgates, road pavement and foundations, railway sleepers, fencing, printing blocks, vehicle bodies, sleds for log skidding, furniture, chopsticks, blowpipes, poles (in pepper cultivation) and survey pegs[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The wood is not suitable for plywood or particle board production[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. It has been esteemed by the Chinese as a coffin wood[
349
Title
Global Tree Campaign - 40 Species in Trade
Publication
 
Author
 
Website
http://www.unep-wcmc.org/trees/trade/40_species_in_trade.htm
Publisher
 
Year
0
ISBN
 
Description
Information on the habitats, uses and some cultivation notes for 40 species of timber trees.
].

Propagation

Seeds are often placed horizontally between two beds of grass, or they are covered with 2 - 5 cm of soil[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Germination usually starts after about 2 weeks (but it may take 6 - 12 months) and the germination rate is approximately 40%[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Scarification (cutting off the top of the seed or removing the whole outer shell) may improve the germination rate to 70%[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Nursery-raised seedlings or wildlings of about 40 cm tall, a height reached after 1 - 1.5 years, are planted into the field at a spacing of 3 metres x 4 metres and need shade[
303
Title
World Agroforesty Centre
Publication
 
Author
 
Website
http://www.worldagroforestry.org/
Publisher
 
Year
0
ISBN
 
Description
An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2019-06-24. <tropical.theferns.info/viewtropical.php?id=Eusideroxylon+zwageri>

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