Quercus aliena
Blume
Fagaceae
Quercus acutidentata (Maxim. ex Wenz.) Koidz.
Quercus hirsutula Blume
Quercus holosericea Blume
Quercus meridionalis Liou
Quercus nara A.DC.
Common Name: Oriental White Oak
General Information
Quercus aliena is a deciduous tree with spreading crown; it that can grow up to 30 metres tall[
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.
,
352- Title
- KemperCentreForHomeGardeningPlantFinder
- Publication
-
- Author
-
- Website
- http://www.mobot.org/gardeninghelp/plantfinder/
- Publisher
- Missouri Botanical Garden
- Year
- 0
- ISBN
-
- Description
- Basic cultivation details, plant uses, habitat etc for several thousand species of plants, mainly from the temperate zone.
].
The tree is harvested from the wild for local use as a food, medicine and source of materials. It is sometimes grown as an ornamental shade tree[
352- Title
- KemperCentreForHomeGardeningPlantFinder
- Publication
-
- Author
-
- Website
- http://www.mobot.org/gardeninghelp/plantfinder/
- Publisher
- Missouri Botanical Garden
- Year
- 0
- ISBN
-
- Description
- Basic cultivation details, plant uses, habitat etc for several thousand species of plants, mainly from the temperate zone.
].
Known Hazards
All parts of the plant contain tannins. Whilst tannins are found in many foods, and have a range of medicinal uses. They are usually only present in low concentrations. In some foods made from oaks (particularly the seeds), the tannin content can be quite high unless the food is treated to reduce tannin content.
Tannins are only of low toxicity and, because of their bitter taste and astringency, are unlikely to be eaten in large quantities. However, if they are taken in excess, they can cause stomach pains; constipation followed by bloody diarrhoea: excessive thirst; and excessive urination[
293- Title
- Poisonous Plants of North Carolina
- Publication
-
- Author
-
- Website
- http://www.ces.ncsu.edu/depts/hort/consumer/poison/poison.htm
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent concise but comprehensive guide to toxic plants that grow in N. Carolina. It lists even those plants that are of very low toxicity, including several well-known food plants such as carrots and potatoes.
].
Botanical References
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
,
58- Title
- Flora of Japan. (English translation)
- Publication
-
- Author
- Ohwi. G.
- Publisher
- Smithsonian Institution
- Year
- 1965
- ISBN
- -
- Description
- The standard work. Brilliant, but not for the casual reader.
,
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.
Range
E. Asia - China, Japan, Korea, Myanmar, Thailand, Laos.
Habitat
Mixed mesophytic forests; at elevations from 100 - 2,700 metres[
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.
].
Properties
Edibility Rating | |
Medicinal Rating | |
Other Uses Rating | |
Habit | Deciduous Tree |
Height | 20.00 m |
Pollinators | Wind |
Cultivation Status | Wild |
Cultivation Details
Quercus aliena is a very cold-hardy tree, tolerating temperatures down to around -25°c when dormant. It grows best in areas with hot summers. In areas with cooler summers, such as the maritime regions of the temperate zone, it often grows poorly, failing to properly ripen its wood and suffering frost damage over the winter[
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
,
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.
].
Grows best in a sunny position[
352- Title
- KemperCentreForHomeGardeningPlantFinder
- Publication
-
- Author
-
- Website
- http://www.mobot.org/gardeninghelp/plantfinder/
- Publisher
- Missouri Botanical Garden
- Year
- 0
- ISBN
-
- Description
- Basic cultivation details, plant uses, habitat etc for several thousand species of plants, mainly from the temperate zone.
], though young plants tolerate reasonable levels of side shade[
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 good deep fertile, well-drained loam which can be on the stiff side[
1- Title
- RHS Dictionary of Plants plus Supplement. 1956
- Publication
-
- Author
- F. Chittendon.
- Publisher
- Oxford University Press
- Year
- 1951
- ISBN
- -
- Description
- Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
,
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
,
352- Title
- KemperCentreForHomeGardeningPlantFinder
- Publication
-
- Author
-
- Website
- http://www.mobot.org/gardeninghelp/plantfinder/
- Publisher
- Missouri Botanical Garden
- Year
- 0
- ISBN
-
- Description
- Basic cultivation details, plant uses, habitat etc for several thousand species of plants, mainly from the temperate zone.
]. Grows well in sandy soils and is also tolerant of alkaline soils[
188- Title
- The RHS Gardener's Encyclopedia of Plants and Flowers
- Publication
-
- Author
- Brickell. C.
- Publisher
- Dorling Kindersley Publishers Ltd.
- Year
- 1990
- ISBN
- 0-86318-386-7
- Description
- Excellent range of photographs, some cultivation details but very little information on plant uses.
,
352- Title
- KemperCentreForHomeGardeningPlantFinder
- Publication
-
- Author
-
- Website
- http://www.mobot.org/gardeninghelp/plantfinder/
- Publisher
- Missouri Botanical Garden
- Year
- 0
- ISBN
-
- Description
- Basic cultivation details, plant uses, habitat etc for several thousand species of plants, mainly from the temperate zone.
]. Tolerates moderate exposure, surviving well but being somewhat stunted[
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.
].
Seedlings soon develop a taproot and become intolerant of root disturbance, they should be planted into their permanent positions whilst young[
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
].
The seed ripens in its first year[
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.
].
Hybridizes freely with other members of the genus[
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.
].
Plants in this genus are notably resistant to honey fungus[
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.
].
Edible Uses
Seed - cooked[
105- Title
- Tanaka's Cyclopedia of Edible Plants of the World.
- Publication
-
- Author
- Tanaka. T. & Nakao S.
- Publisher
- Keigaku Publishing; Tokyo
- Year
- 1976
- ISBN
- -
- Description
- The most comprehensive list of edible plants I've come across. Only the briefest entry for each species, though, and some of the entries are more than a little dubious. Not for the casual reader.
,
177- Title
- Plants for Human Consumption.
- Publication
-
- Author
- Kunkel. G.
- Publisher
- Koeltz Scientific Books
- Year
- 1984
- ISBN
- 3874292169
- Description
- An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
]. The seed is up to 25mm long and 18mm wide[
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.
].
The seed is usually cooked before eating, though it can also be eaten raw. It can be eaten whole, though it is more commonly dried, then ground into a powder and used as a thickening in stews etc or mixed with cereals for making bread.
In some species, especially many of those classified as 'white oaks', the seeds are low in tannins and have a more or less sweet and agreeable flavour. The seed of most species, however, have a very bitter flavour, due especially to the presence of tannins. In these species there are various processes that can remove or at least reduce the amount of these bitter substances (although other water-soluble substances, including some minerals, will also be removed).
Tannins are water-soluble and therefore the easiest way to remove or reduce tannin levels is by soaking in water. A few different methods are listed:-
A traditional method of preparing the seed was to bury it in boggy ground overwinter and allow the wet soil to gradually leach the tannins. The germinating seed was dug up in the spring when it would have lost most of its astringency and bitterness.
Another method was to wrap the seeds in a cloth bag and place them in a stream for several weeks.
Drying the seed and grinding it to a powder before soaking speeds up the process. The fastest method is to use hot water, by cooking the powder and changing the water several times until the cooking water is no longer bitter. Alternatively, you can use cold water (which is reported to produce the best quality flour). In this case, you soak the powdered seed in cold water for 12 - 24 hours then discard the water. Repeat this process for a number of times until the soak water is no longer bitter.
The roasted seed of many Quercus species has been used as a coffee substitute.
Medicinal
Quercus (oak) species are used in the traditional medicine of many cultures, being valued especially for their tannins. Various parts of the plant can be used, most frequently it is the leaves, bark, seeds, seed cups or the galls that are produced as a result of insect damage. A decoction or infusion is astringent, antibacterial, antifungal, antiseptic, styptic and haemostatic. It is taken internally to treat conditions such as acute diarrhea, dysentery and haemorrhages. Externally, it is used as a mouthwash to treat toothache or gum problems and is applied topically as a wash on cuts, burns, various skin problems, haemorrhoids and oral, genital and anal mucosa inflammation[
4- Title
- A Modern Herbal.
- Publication
-
- Author
- Grieve.
- Publisher
- Penguin
- Year
- 1984
- ISBN
- 0-14-046-440-9
- Description
- Not so modern (1930's?) but lots of information, mainly temperate plants.
]. Extracts of the plant can be added to ointments and used for the healing of cuts[
4- Title
- A Modern Herbal.
- Publication
-
- Author
- Grieve.
- Publisher
- Penguin
- Year
- 1984
- ISBN
- 0-14-046-440-9
- Description
- Not so modern (1930's?) but lots of information, mainly temperate plants.
,
1231- Title
- Antibacterial and Antifungal Activities of Some Quercus Species Growing in Turkey
- Publication
- FABAD J. Pharm. Sci., 32, 127-130, 2007
- Author
- Didem Söhretoğlu; Melike Ekizoğlu; Ekrem Kiliç; M. Koray Sak
- Publisher
-
- Year
- 2007
- ISBN
-
- Description
-
].
Other Uses
The leaves of most species in this genus are more or less rich in tannins. A mulch of the partially decayed leaves can be placed around vulnerable plants in order to repel slugs, snails, grubs etc, and these will in time break down to add humus and nutrients to the soil. Fresh leaves should be used with caution, however, since as these decay they utilize some of the nitrogen in the soil and thus can inhibit plant growth[
20- Title
- Companion Planting for Successful Gardening.
- Publication
-
- Author
- Riotte. L.
- Publisher
- Garden Way, Vermont, USA.
- Year
- 1978
- ISBN
- 0-88266-064-0
- Description
- Fairly good.
,
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
Oak galls are excrescences that are sometimes produced in great numbers on the tree and are caused by the activity of the larvae of different insects. The insects live inside these galls, obtaining their nutrient therein. When the insect pupates and leaves, the gall can be used as a rich source of tannin, that can also be used as a dyestuff and is also used by many cultures to make ink[
4- Title
- A Modern Herbal.
- Publication
-
- Author
- Grieve.
- Publisher
- Penguin
- Year
- 1984
- ISBN
- 0-14-046-440-9
- Description
- Not so modern (1930's?) but lots of information, mainly temperate plants.
,
331- Title
- Flora of Guatemala
- Publication
-
- Author
- Standley P.C. & J. A. Steyermark
- Website
- http://www.archive.org/
- Publisher
-
- Year
- 1946 - 1976
- ISBN
-
- Description
- A superb reference, though somewhat dated. Gives lots of plant uses as well as information on plant habit and habitat. The entire flora (13 volumes) can now be downloaded from http://www.archive.org/
].
The bark of oak trees is also usually rich in tannins and can be used as a dyestuff and for waterproofing rope[
331- Title
- Flora of Guatemala
- Publication
-
- Author
- Standley P.C. & J. A. Steyermark
- Website
- http://www.archive.org/
- Publisher
-
- Year
- 1946 - 1976
- ISBN
-
- Description
- A superb reference, though somewhat dated. Gives lots of plant uses as well as information on plant habit and habitat. The entire flora (13 volumes) can now be downloaded from http://www.archive.org/
,
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
The wood is of local value, it is used mainly for boat building[
61- Title
- A Dictionary of Plants Used by Man.
- Publication
-
- Author
- Usher. G.
- Publisher
- Constable
- Year
- 1974
- ISBN
- 0094579202
- Description
- Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.
,
].
The wood of many Oak species is a favoured fuel - burning well and giving off a lot of heat[
331- Title
- Flora of Guatemala
- Publication
-
- Author
- Standley P.C. & J. A. Steyermark
- Website
- http://www.archive.org/
- Publisher
-
- Year
- 1946 - 1976
- ISBN
-
- Description
- A superb reference, though somewhat dated. Gives lots of plant uses as well as information on plant habit and habitat. The entire flora (13 volumes) can now be downloaded from http://www.archive.org/
].
Propagation
Seed - it quickly loses viability if it is allowed to dry out. It can be stored moist and cool overwinter but is best sown as soon as it is ripe in an outdoor seed bed, though it must be protected from mice, squirrels etc. Small quantities of seed can be sown in deep pots in a cold frame. Plants produce a deep taproot and need to be planted out into their permanent positions as soon as possible, in fact seed sown in situ will produce the best trees[
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
]. Trees should not be left in a nursery bed for more than 2 growing seasons without being moved or they will transplant very badly.