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Uses

Toxic parts

The seed contains a mildly acrimonious principle that is unstable when heated. It is therefore best to cook the seed before eating it to ensure any possible toxicity is destroyed. This acrimonious principle is probably 4'-methoxypyridoxine, which can destroy vitamin B6[1]. It is more toxic for children, but the raw nuts would have to be eaten often over a period of time for the negative effects to become apparent[1].

Edible uses

Notes

Seed - raw (in small quantities), or cooked[1]. A soft and oily texture[2], the seed has a sweet flavour[3][4] and tastes somewhat like a large pine nut[1]. The baked seed makes very pleasant eating, it has a taste rather like a cross between potatoes and sweet chestnuts[K]. The seed can be boiled and used in soups, porridges etc[5][1]. It needs to be heated before being eaten in order to destroy a mildly acrimonious principle[6]. Another report says that the seed can be eaten raw[7] whilst another says that large quantities of the seed are toxic[8]. See the notes above on toxicity for more details[1]. The raw seed is said to have a fish-like flavour[8]. The seed is rich in niacin[9]. It is a good source of starch and protein, but is low in fats[1]. These fats are mostly unsaturated or monosaturated[1]. A more detailed nutritional analysis is available[8]. An edible oil is obtained from the seed[3][5].

Unknown part

Oil

Material uses

An oil from the seed is used as a fuel in lighting[3]. A soap substitute is produced by mixing the pulp of the seed (is the fruit meant here?) with oil or wine[10]. Wood - light, soft, it has insect repelling qualities[11].

Unknown part

Medicinal uses(Warning!)

Ginkgo has a long history of medicinal use in traditional Chinese medicine, where the seed is most commonly used. These uses are mentioned in more detail later. Recent research into the plant has discovered a range of medicinally active compounds in the leaves and this has excited a lot of interest in the health-promoting potential of the plant[1]. In particular, the leaves stimulate the blood circulation and have a tonic effect on the brain, reducing lethargy, improving memory and giving an improved sense of well-being[1]. They have also been shown to be effective in improving peripheral arterial circulation[8][1] and in treating hearing disorders such as tinnitus where these result from poor circulation or damage by free radicals[1]. The leaves contain ginkgolides, these are compounds that are unknown in any other plant species[12]. Ginkgolides inhibit allergic responses and so are of use in treating disorders such as asthma[12]. Eye disorders and senility have also responded to treatment[1]. The leaves are best harvested in the late summer or early autumn just before they begin to change colour. They are dried for later use[1][12]. The fruit is antibacterial, antifungal, astringent, cancer, digestive, expectorant, sedative, vermifuge[11][13][14][10]. The fruit is macerated in vegetable oil for 100 days and then the pulp is used in the treatment of pulmonary tuberculosis, asthma, bronchitis etc[8]. (This report might be referring to the seed rather than the fleshy fruit[K]). The cooked seed is antitussive, astringent and sedative[8]. It is used in the treatment of asthma, coughs with thick phlegm and urinary incontinence[14][12]. The raw seed is said to have anticancer activity and also to be antivinous[14][8]. It should be used with caution, however, due to reports of toxicity[14][8]. The cooked seeds stabilize spermatogenesis[14].

Ecology

Ecosystem niche/layer

Canopy

Ecological Functions

Nothing listed.

Forage

Nothing listed.

Shelter

Nothing listed.

Propagation

Seed - best sown as soon as it is ripe in a cold frame or in a sheltered outdoor bed[15][16]. The seed requires stratification according to one report[15] whilst another says that stratification is not required[16] and that the seed can be sown in spring but that it must not have been allowed to dry out[16]. Germination is usually good to fair. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in light shade in the greenhouse for their first year. Plant them out into their permanent positions in the following spring[15][16] and consider giving them some protection from winter cold for their first winter outdoors[K]. Softwood cuttings in a frame in spring[12]. Cuttings of half-ripe wood, July/August in a frame. The cutting may not grow away in its first year but usually grows all right after that[17]. Cuttings of mature wood, December in a frame[18].

Practical Plants is currently lacking information on propagation instructions of Ginkgo biloba. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Succeeds in most soil types so long as they are well-drained[11][18][19], though it prefers a rather dry loam in a position sheltered from strong winds[20]. Some of the best specimens in Britain are found growing on soils over chalk or limestone[21]. Plants flower and fruit more reliably after hot summers or when grown in a warm sunny position[19]. Established plants are drought resistant[11], they also tolerate atmospheric pollution[11][18]. Plants can grow in poor hard-packed soil, making the male forms good candidates for street planting[2]. Trees are often used for street planting in towns, only the males are used because the fruit from female plants has a nauseous smell. The fruit contains butanoic acid, it has the aroma of rancid butter[18]. Ginkgo is a very ornamental plant[22][11] and there are several named forms[20][18]. This species is the only surviving member of a family that was believed to be extinct until fairly recent times. It has probably remained virtually unchanged for at least 150 million years and might have been growing when the dinosaurs were roaming the earth[1]. It is exceptional in having motile sperm[21] and fertilization may not take place until after the seed has fallen from the tree[23]. This genus belongs to a very ancient order and has affinities with tree ferns and cycads[21]. The ginkgo is usually slow growing, averaging less than 30cm per year with growth taking place from late May to the end of August[21]. Growth is also unpredictable, in some years trees may not put on any new growth whilst in others there may be 1 metre of growth[21]. This variability does not seem to be connected to water or nutrient availability. Trees are probably long-lived in Britain, one of the original plantings (in 1758) is still growing and healthy at Kew (1993). Plants are not troubled by insects or diseases[7][18], have they evolved a resistance?[7]. Ginkgo is a popular food and medicinal crop in China, the plants are often cultivated for this purpose and are commonly grown in and around temples. Plants are either male or female, one male plant can pollinate up to 5 females. It takes up to 35 years from seed for plants to come into bearing[11]. Prior to maturity the sexes can often be distinguished because female plants tend to have almost horizontal branches and deeply incised leaves whilst males have branches at a sharper angle to the trunk and their leaves are not so deeply lobed[7]. Branches of male trees can be grafted onto female frees in order to fertilize them. When a branch from a female plant was grafted onto a male plant at Kew it fruited prolifically[20]. Female trees have often been seen in various gardens with good crops of fruit[K]. Seeds are marked by two or three longitudinal ridges, it is said that those with two ridges produce female plants whilst those with three ridges produce male plants[10]. Trees can be coppiced[18]. They can also be pruned into a fan-shape for growing on walls[19]. Another report says that the trees dislike pruning and will often die back as a result[12].

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Ginkgo biloba. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Ginkgo biloba.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Ginkgo biloba
Genus
Ginkgo
Family
Ginkgoaceae
Imported References
Material uses & Functions
Botanic
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
4
Heat Zone
?
Water
moderate
Sun
full sun
Shade
no shade
Soil PH
Soil Texture
Soil Water Retention
Environmental Tolerances
  • Drought
Ecosystems
Native Climate Zones
None listed.
Adapted Climate Zones
None listed.
Native Geographical Range
None listed.
Native Environment
None listed.
Ecosystem Niche
Root Zone Tendancy
None listed.
Life
Deciduous or Evergreen
Herbaceous or Woody
Life Cycle
Growth Rate
Mature Size
30 x 9 meters
Fertility
Pollinators
Flower Colour
?
Flower Type

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"image:Ginkgo biloba fructification.jpg|248px" cannot be used as a page name in this wiki.

"image:Ginkgo biloba fructification.jpg|248px" cannot be used as a page name in this wiki.

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References

  1. ? 1.001.011.021.031.041.051.061.071.081.091.101.111.121.131.141.151.16 Hobbs. C. Ginkgo. Elixir of Youth. Botanica Press, California. ISBN 0-9618470-3-4 (1994-01-01)
  2. ? 2.02.12.2 Elias. T. The Complete Trees of N. America. Field Guide and Natural History. Van Nostrand Reinhold Co. ISBN 0442238622 (1980-01-01)
  3. ? 3.03.13.23.33.4 Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications ISBN 0-486-20459-6 (1972-01-01)
  4. ? 4.04.1 Howes. F. N. Nuts. Faber (1948-01-01)
  5. ? 5.05.15.2 Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications ISBN 0-9628087-0-9 (1990-01-01)
  6. ? 6.06.1 Schery. R. W. Plants for Man. ()
  7. ? 7.07.17.27.37.4 Bianchini. F., Corbetta. F. and Pistoia. M. Fruits of the Earth. ()
  8. ? 8.08.18.28.38.48.58.68.78.88.9 Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. ISBN 0-917256-20-4 (1985-01-01)
  9. ? 9.09.1 Natural Food Institute, Wonder Crops. 1987. ()
  10. ? 10.010.110.210.310.4 Stuart. Rev. G. A. Chinese Materia Medica. Taipei. Southern Materials Centre ()
  11. ? 11.011.111.211.311.411.511.611.711.8 Rosengarten. jnr. F. The Book of Edible Nuts. Walker & Co. ISBN 0802707699 (1984-01-01)
  12. ? 12.012.112.212.312.412.512.6 Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. ISBN 0-7513-020-31 (1995-01-01)
  13. ? 13.013.1 ? A Barefoot Doctors Manual. Running Press ISBN 0-914294-92-X ()
  14. ? 14.014.114.214.314.414.5 Yeung. Him-Che. Handbook of Chinese Herbs and Formulas. Institute of Chinese Medicine, Los Angeles (1985-01-01)
  15. ? 15.015.115.2 Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co (1948-01-01)
  16. ? 16.016.116.216.3 McMillan-Browse. P. Hardy Woody Plants from Seed. Grower Books ISBN 0-901361-21-6 (1985-01-01)
  17. ? Dirr. M. A. and Heuser. M. W. The Reference Manual of Woody Plant Propagation. Athens Ga. Varsity Press ISBN 0942375009 (1987-01-01)
  18. ? 18.018.118.218.318.418.518.618.7 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-01-01)
  19. ? 19.019.119.2 Davis. B. Climbers and Wall Shrubs. Viking. ISBN 0-670-82929-3 (1990-01-01)
  20. ? 20.020.120.220.3 Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray (1981-01-01)
  21. ? 21.021.121.221.321.4 Mitchell. A. F. Conifers in the British Isles. HMSO ISBN 0-11-710012-9 (1975-01-01)
  22. ? F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press (1951-01-01)
  23. ? Rushforth. K. Conifers. Christopher Helm ISBN 0-7470-2801-X (1987-01-01)
Facts about "Ginkgo biloba"RDF feed
Article is incompleteYes +
Belongs to familyGinkgoaceae +
Belongs to genusGinkgo +
Has binomial nameGinkgo biloba +
Has common nameMaidenhair Tree +
Has drought toleranceTolerant +
Has edible partUnknown part + and Seed +
Has edible useOil + and Unknown use +
Has environmental toleranceDrought +
Has fertility typeSelf sterile + and Wind +
Has flowers of typeDioecious +
Has growth rateSlow +
Has hardiness zone4 +
Has imageGinkgo biloba fructification.jpg +
Has lifecycle typePerennial +
Has material partUnknown part +
Has material useOil +, Soap + and Wood +
Has mature height30 +
Has mature width9 +
Has medicinal partUnknown part +
Has medicinal useAntiasthmatic +, Antibacterial +, Antifungal +, Astringent +, Cancer +, Digestive +, Expectorant +, Infertility +, Ophthalmic +, Sedative +, Tonic + and Vermifuge +
Has primary imageGinkgo biloba fructification.jpg +
Has search nameginkgo biloba + and maidenhair tree +
Has shade toleranceNo shade +
Has soil ph preferenceAcid +, Neutral + and Alkaline +
Has soil texture preferenceSandy +, Loamy + and Clay +
Has soil water retention preferenceWell drained +
Has sun preferenceFull sun +
Has taxonomic rankSpecies +
Has taxonomy nameGinkgo biloba +
Has water requirementsmoderate +
Inhabits ecosystem nicheCanopy +
Is deciduous or evergreenDeciduous +
Is herbaceous or woodyWoody +
Is taxonomy typeSpecies +
PFAF cultivation notes migratedYes +
PFAF edible use notes migratedYes +
PFAF material use notes migratedYes +
PFAF medicinal use notes migratedYes +
PFAF propagation notes migratedYes +
PFAF toxicity notes migratedYes +
Tolerates nutritionally poor soilNo +
Uses mature size measurement unitMeters +
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