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Useful Tropical Plants

Dimocarpus longan

Lour.

Sapindaceae

+ Synonyms

Euphoria longan (Lour.) Steud.

Euphoria longana Lam.

Nephelium longana Cambess.

Nephelium long-yan Blume

Common Name: Longan

Dimocarpus longan
Cultivated small tree with a good crop of fuit
Photograph by: Bùi Th?y ?ào Nguyên
Creative Commons Attribution-Share Alike 3.0
Dimocarpus longan Dimocarpus longan Dimocarpus longan Dimocarpus longan Dimocarpus longan Dimocarpus longan Dimocarpus longan Dimocarpus longan

General Information

Longan is a handsome, erect, fast-growing, evergreen tree with a many-branched crown, usually growing 9 - 14 metres tall but able to reach a height of 25 metres or more. The bole can be 1 metre in diameter, sometimes with buttresses[
320
Title
Trees Commonly Cultivated in SE Asia
Publication
 
Author
Jensen. M.
Publisher
FAO Regional Office, Bangkok.
Year
1999
ISBN
974-89377-5-5
Description
 
,
404
Title
Digital Compendium of Forestry Species of Cambodia
Publication
 
Author
 
Website
http://www.digitalspecies.blogspot.com
Publisher
www.digitalspecies.blogspot.com; Phnom Penh
Year
2008
ISBN
 
Description
A very detailed booklet, produced in PDF format on the internet, giving information on around 100 species of trees.
].
The fruit is highly valued in the Orient, especially in China, both as a food and as a medicine[
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 often sold in local markets and is also sometimes exported. The tree is often cultivated in tropical, subtropical and frost-free warm temperate areas for its edible fruit[
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.
].

Known Hazards

None known

Botanical References

200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
266
Title
Flora of China
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/china/
Publisher
Missouri Botanical Garden Press; St. Louis.
Year
1994
ISBN
 
Description
An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.

Range

E. Asia - China, India, Sri Lanka, Myanmar, Thailand, Cambodia, Laos, Vietnam, Malaysia, Indonesia, Philippines.

Habitat

Humid mountain woodlands[
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.
]. Usually found in the understorey of primary forests, sometimes in secondary formations[
404
Title
Digital Compendium of Forestry Species of Cambodia
Publication
 
Author
 
Website
http://www.digitalspecies.blogspot.com
Publisher
www.digitalspecies.blogspot.com; Phnom Penh
Year
2008
ISBN
 
Description
A very detailed booklet, produced in PDF format on the internet, giving information on around 100 species of trees.
].

Properties

Edibility Rating *  *  *  *
Medicinal Rating *  *  *
Other Uses Rating *  *
HabitEvergreen Tree
Height12.00 m
Growth RateFast
Self-fertileYes
Cultivation StatusCultivated, Wild

Cultivation Details

Whilst the longan succeeds in warm temperate to tropical areas, it requires a distinct cool season of up to 3 months with virtually no frost to initiate blooming[
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.
] and so does not fruit well at low elevations in the tropics[
335
Title
Perennial Edible Fruits of the Tropics : an Inventory
Publication
 
Author
Martin, F. W.; Campbell, C. W.; Rubertbe, R. M.
Publisher
U.S. Dept. of Agriculture, Agricultural Research Service
Year
1987
ISBN
 
Description
A booklet giving terse details of almost 300 species of edible fruits, plus regional lists of Botanical and Common names for over 2,500 less well-known edible fruits of the tropics.
]. Flowering is poor after a warm winter and in areas with no clear cool season[
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 needs chilling temperatures of about 7 - 12°c, or a 2 - 3 month period with temperatures about 15 - 22°c and a short dry period in order to stimulate flowering[
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.
]. From fruit set onwards high temperatures do not hamper development, but nights should not be warmer than 20 - 25°c[
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 temperature range for growth is reported to be 7 - 36°c with the optimum between 18 - 30°c[
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.
]. Ample soil moisture is needed from fruit set until maturity; suitable annual precipitation is about 1,500 - 2,000mm[
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 annual rainfall range for growth is reported to be 800 - 3,000mm[
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 some shade from the strongest sun[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Succeeds on most fertile soils so long as there is an abundance of moisture[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Prefers a pH in the range 5.5 - 6, but can tolerate 5 - 8[
404
Title
Digital Compendium of Forestry Species of Cambodia
Publication
 
Author
 
Website
http://www.digitalspecies.blogspot.com
Publisher
www.digitalspecies.blogspot.com; Phnom Penh
Year
2008
ISBN
 
Description
A very detailed booklet, produced in PDF format on the internet, giving information on around 100 species of trees.
].
Seedling trees take 7 - 10 years to commence bearing fruit, whilst vegetatively propagated trees can fruit in 3 - 5 years[
335
Title
Perennial Edible Fruits of the Tropics : an Inventory
Publication
 
Author
Martin, F. W.; Campbell, C. W.; Rubertbe, R. M.
Publisher
U.S. Dept. of Agriculture, Agricultural Research Service
Year
1987
ISBN
 
Description
A booklet giving terse details of almost 300 species of edible fruits, plus regional lists of Botanical and Common names for over 2,500 less well-known edible fruits of the tropics.
].
Full-grown trees given sufficient room may yield 180 - 225 kg of fruit in good years. Larger trees have larger crops but if the trees become too tall harvesting is too difficult, and they should be topped[
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.
]. A serious problem with the longan is its irregular bearing - often one good year is followed by 1 or 2 poor 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.
].
There are some named varieties[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
301
Title
Cornucopia II
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications, California.
Year
1998
ISBN
0-9628087-2-5
Description
The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
].
Trees are usually self-fertile[
335
Title
Perennial Edible Fruits of the Tropics : an Inventory
Publication
 
Author
Martin, F. W.; Campbell, C. W.; Rubertbe, R. M.
Publisher
U.S. Dept. of Agriculture, Agricultural Research Service
Year
1987
ISBN
 
Description
A booklet giving terse details of almost 300 species of edible fruits, plus regional lists of Botanical and Common names for over 2,500 less well-known edible fruits of the tropics.
].

Edible Uses

Fruit - raw or cooked. The mucilaginous flesh is whitish, translucent and somewhat sweet, though not as flavoursome as the related lychee(Litchi chinensis)[
301
Title
Cornucopia II
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications, California.
Year
1998
ISBN
0-9628087-2-5
Description
The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
,
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 delicious eaten raw and can also be dried, preserved in syrup, cooked in sweet and sour dishes or in soups[
301
Title
Cornucopia II
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications, California.
Year
1998
ISBN
0-9628087-2-5
Description
The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
]. The globose fruits are 12 - 25mm in diameter, with a thin, brittle, yellow-brown to light reddish-brown rind[
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.
].
Longans are much eaten fresh, out-of-hand, but some have maintained that the fruit is improved by cooking[
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.
]. In China, the majority are canned in syrup or dried. For drying, the fruits are first heated to shrink the flesh and facilitate peeling of the rind. Then the seeds are removed and the flesh dried over a slow fire[
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 dried product is black, leathery and smoky in flavour and is mainly used to prepare an infusion drunk for refreshment[
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.
].

Medicinal

The flesh of the fruit is administered as a stomachic, febrifuge and vermifuge, and is regarded as an antidote for poison. A decoction of the dried flesh is taken as a tonic and treatment for insomnia and neurasthenic neurosis[
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.
].

In both North and South Vietnam, the 'eye' of the longan seed is pressed against a snakebite in the belief that it will absorb the venom[
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.
].

Leaves and flowers are sold in Chinese herb markets but are not a part of ancient traditional medicine. The leaves contain quercetin and quercitrin[
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 seeds are administered to counteract heavy sweating and the pulverized kernel, which contains saponin, tannin and fat, serves as a styptic[
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.
].

Other Uses

The seeds, because of their saponin content, are used like soapberries (Sapindus saponaria L.) for shampooing the hair[
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 seeds and the rind are burnt for fuel[
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 heartwood is reddish brown it is not clearly demarcated from the lighter-coloured sapwood. The wood is strong, tough, very hard, difficult to split, highly durable, easily but slowly drying with little or no degradation. It is used for posts, agricultural implements, furniture, construction, shuttle pipes, bearings, textile weaving stands and rifle butts[
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.
,
404
Title
Digital Compendium of Forestry Species of Cambodia
Publication
 
Author
 
Website
http://www.digitalspecies.blogspot.com
Publisher
www.digitalspecies.blogspot.com; Phnom Penh
Year
2008
ISBN
 
Description
A very detailed booklet, produced in PDF format on the internet, giving information on around 100 species of trees.
,
451
Title
Flora Malesiana Series 1
Publication
 
Author
Various
Website
http://www.archive.org
Publisher
Nationaal Herbarium Nederiand, Universiteit Leiden branch
Year
0
ISBN
 
Description
A massive treatment of the plants of the Malaysian Archipelago. Much of it has been made available to download from the Internet
].
The wood is not highly valued for fuel[
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.
].

Propagation

Most longan trees are grown from seed. After drying in the shade for 4 days, they should be planted without delay, but no more than 2 cm deep, otherwise they may send up more than one sprout[
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 takes place within 7-10 days[
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 seedlings are transplanted to shaded nursery rows the following spring and set in the field 2-3 years later during winter dormancy[
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.
].
Air layering. Air-layers bear in 2-3 years after planting[
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.
].
Grafting

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