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Useful Tropical Plants

Agathis silbae

de Laub.

Araucariaceae

+ Synonyms

Common Name:

No Image.

General Information

Agathis silbae is an evergreen tree with a broad crown of long, spreading and ascending branches; it usually grows up to 35 metres tall, occasionally reaching 60 metres. The straight, cylindrical bole can be up to 200cm in diameter, free of branches for 10 metres or more[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
A vast amount of information on conifers and families of gymnosperms.
].
The tree is harvested from the wild for commercial use of its timber.
Agathis silbae is currently only known from a very limited area on the island of Espiritu Santo. The extent of occurrence, the area of occupancy, and the number of locations are all within the thresholds for Endangered. However there is still insufficient evidence of recent or ongoing decline to fully meet the requirements for such an assessment. The recent surveys also indicate that listing as Vulnerable would be inappropriate. Due to its limited distribution, logging is a potential threat unless carefully managed. Unrestricted exploitation would warrant an immediate listing as Endangered. The plant is classified as 'Near Threatened' in the IUCN Red List of Threatened Species(2013)[
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

None known

Botanical References


Range

Pacific - Vanuatu (Espiritu Santo)

Habitat

An emergent large tree in tropical lower montane rainforest on the wetter, western and northwestern slopes of the central mountain range of Espiritu Santo[
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.
].

Properties

Conservation StatusNear Threatened
Medicinal Rating *  *
Other Uses Rating *  *  *
HabitEvergreen Tree
Height30.00 m
PollinatorsWind
Cultivation StatusWild

Cultivation Details

Agathis silbae is native to the wet tropics in the Pacific. It experiences a mean annual rainfall of around 4,500mm[
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.
].
Young plants grow better in the shelter and shade of the woodland, but require increasing amounts of light as they grow larger[
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.
].

Edible Uses

None known

Medicinal

A resin obtained from the tree is used medicinally[
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.
].

Other Uses

A resin is obtained from the trunk, branches and cones. It has been used for lighting, caulking canoes etc[
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 resin is burnt and the smoke used in tattooing[
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.
].
Agathis species in general yield a high quality resin, often known as Manila Copal. The resins obtained from Agathis borneensis, Agathis dammara, Agathis lanceolata, Agathis macrophylla and Agathis philippinensis are the most important commercially, but all members of the genus yield usuable quantities.
The resin is obtained in three forms. Firstly, it naturally exudes from the bark, branches, cones etc of the tree, especially as a result of any damage - some of these exudations can weigh as much as 20 kilos. The second form, known as fossil resin, is dug up from the ground - some of this resin can be of fairly recent origin (perhaps secreted by the roots of trees that have been felled, but much of it can be up to 50,000 years old, perhaps formed on a tree that fell naturally and was then gradually buried. The third form of resin is harvested by tapping the tree, though this can easily damage the tree and lead to premature death.
The resin has a range of applications. Traditionally it has been used as a fuel for camp fires, as a torch, as a waterproofing on boats, as a medicine, the smoke from the burning resin is used as a black dye and for tatooing. The resin is used commercially in making high quality varnishes, lacquers, linoleum[
64
Title
Vegetable Gums and Resins.
Publication
 
Author
Howes. F. N.
Publisher
Faber
Year
 
ISBN
81-88818-17-8
Description
A very good book dealing with the subject in a readable way.
].

The timber is similar in appearance and properties to other Agathis species[
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 wood obtained from the various species of Agathis is very uniform. It is a cream white or light yellow in colour, often with a pink reflection, turning golden brown on exposure; there is no clear demarcation between heartwood and sapwood. The grain is straight, the texture fine. Drying rate is normal to slow; there is a risk of blue stain. The blunting effect on tools is normal and the peeling and slicing is reported to be good; planed surfaces are lustrous; it takes stains well; nailing is good; gluing is correct[
386
Title
Forest Stewardship Council.
Publication
 
Author
 
Website
http://www.fsc.dk/index.php?id=256&PHPSESSID=367043b95e93a891cf96369e9264cd03
Publisher
 
Year
0
ISBN
 
Description
The site contains information on the properties of some less well-known tropical timbers. The Forest Stewardship Council works actively to protect tropical forests by encouraging sustainable harvesting of the trees.
]. It is used for various interior purposes such as high class furniture, veneer, boxes and crates, light carpentry, musical instruments, moulding, sliced veneer, joinery, panelling, matches, wood-ware[
386
Title
Forest Stewardship Council.
Publication
 
Author
 
Website
http://www.fsc.dk/index.php?id=256&PHPSESSID=367043b95e93a891cf96369e9264cd03
Publisher
 
Year
0
ISBN
 
Description
The site contains information on the properties of some less well-known tropical timbers. The Forest Stewardship Council works actively to protect tropical forests by encouraging sustainable harvesting of the trees.
].

Propagation

Seed - it cannot tolerate desiccation and does not store for much more than 2 months in normal conditions. It does not require pre-treatment. Sowing is done with the wing part of the seed pointing upwards and 66% of the seed buried in the soil. Germination commences within 6 days, with 90 - 100% germination rates within 10 days[
325
Title
Seed Leaflets
Publication
 
Author
Various
Website
http://en.sl.life.ku.dk/Publikationer/Udgivelser/PopulaerPublikationer.aspx?katid={D28373CC-6EF3-4EF8-B097-6D83FABF209E}&serieid={9F1C3DB1-6E7B-4CF1-AF53-F480B0CB40EF}&sort=title
Publisher
Forest & Landscape. Denmark
Year
0
ISBN
 
Description
A series of leaflets, jointly produced by the University of Copenhagen and the Royal Botanic Gardens at Kew, focussing on seed information for a number species, but also giving a lot of other information about each plant.
].
Cuttings of leading shoots[
307
Title
Tropical and Subtropical Trees - A Worldwide Encyclopaedic Guide.
Publication
 
Author
Barwick. M.
Publisher
Thames & Hudson, London
Year
2004
ISBN
0-500-51181-0
Description
A superb book, very concise and well written, giving a wealth of information on 400 or more species including descriptions, habitat, cultivation details and plant uses. A wealth of colour photographs bring each plant vividly to life.
].
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2019-08-25. <tropical.theferns.info/viewtropical.php?id=Agathis+silbae>

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