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Quercus emoryi - Torr.
                 
Common Name Black Oak, Emory oak
Family Fagaceae
USDA hardiness 6-9
Known Hazards None known
Habitats Canyons, dry foothills and mountain slopes, 1350 - 2350 metres[229], growing best in sheltered valleys[82].
Range South-western N. America - W. Texas, New Mexico, Arizona and northern Mexico.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Semi-shade Full sun

Summary

Quercus emoryi Black Oak, Emory oak


Quercus emoryi Black Oak, Emory oak
http://commons.wikimedia.org/wiki/User:Pompilid
   
Physical Characteristics
 icon of manicon of cone
Quercus emoryi is an evergreen Tree growing to 12 m (39ft 4in) at a slow rate.
It is hardy to zone (UK) 7 and is not frost tender. It is in leaf 12-Jan It is in flower in May, and the seeds ripen in September. The flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by Wind.Suitable for: medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil. The plant can tolerates strong winds but not maritime exposure.

Synonyms

Habitats
Woodland Garden Canopy;
Edible Uses
Edible Parts: Seed.
Edible Uses: Coffee.

Seed - raw or cooked[257]. A sweet taste[63, 85, 161], it is an important item of food for the Indians in S. Arizona and northern Mexico and is sold in the local markets there[46, 82, 85]. The seed is up to 2cm long and 1cm thick[82, 200]. It can be dried, ground into a powder and used as a thickening in stews etc or mixed with cereals for making bread. If the seed contains bitter tannins, these can be leached out by thoroughly washing the seed in running water though many minerals will also be lost. Either the whole seed can be used or the seed can be dried and ground it into a powder. It can take several days or even weeks to properly leach whole seeds, one method was to wrap them in a cloth bag and place them in a stream. Leaching the powder is quicker. A simple taste test can tell when the tannin has been leached. The traditional method of preparing the seed was to bury it in boggy ground overwinter. The germinating seed was dug up in the spring when it would have lost most of its astringency. The roasted seed is a coffee substitute.
Medicinal Uses


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Astringent.

Any galls produced on the tree are strongly astringent and can be used in the treatment of haemorrhages, chronic diarrhoea, dysentery etc[4].
Other Uses
Fuel;  Repellent;  Tannin;  Wood.

A mulch of the leaves repels slugs, grubs etc, though fresh leaves should not be used as these can inhibit plant growth[20]. 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[4]. Wood - heavy, hard, strong, brittle, close grained[82]. Of little value commercially, though it is an important fuel in its native range[229].
Cultivation details
Fodder: Mast;  Management: Standard;  Staple Crop: Balanced carb;  Wild Staple Crop.

Prefers a good deep fertile loam which can be on the stiff side[1, 11]. Young plants tolerate reasonable levels of side shade[200]. Tolerates moderate exposure, surviving well but being somewhat stunted[200]. Prefers warmer summers than are usually experienced in Britain, trees often grow poorly in this country and fail to properly ripen their wood resulting in frost damage overwinter[200]. A slow-growing tree in its native range[229]. Seed production is cyclical, with a year of high production followed by a few years of low production. The tree flowers on new growth produced in spring, the seed ripening in its first year[200, 229]. Intolerant of root disturbance, trees should be planted in their permanent positions whilst young[11]. Hybridizes freely with other members of the genus[200]. Plants in this genus are notably resistant to honey fungus[200].
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]. Trees should not be left in a nursery bed for more than 2 growing seasons without being moved or they will transplant very badly.

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Other Names
Found In
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Quercus acutaJapanese Evergreen Oak22
Quercus acutissimaSawthorn Oak22
Quercus agrifoliaEncina, California live oak, Coast Live Oak32
Quercus albaWhite Oak, Hybrid oak32
Quercus alienaOriental White Oak22
Quercus aucheriBoz-Pirnal Oak42
Quercus bicolorSwamp White Oak42
Quercus cerrisTurkey Oak, European turkey oak32
Quercus chrysolepisLive Oak, Canyon live oak22
Quercus cocciferaKermes Oak32
Quercus coccineaScarlet Oak22
Quercus dentataJapanese Emperor Oak, Daimyo oak22
Quercus douglasiiBlue Oak32
Quercus durataCalifornia Scrub Oak, Leather oak22
Quercus ellipsoidalisNorthern Pin Oak22
Quercus engelmanniiEvergreen Oak, Engelmann oak, Mesa Oak22
Quercus falcataSouthern Red Oak, Cherrybark Oak, Spanish Oak, Southern Red Oak12
Quercus floribunda 22
Quercus frainettoHungarian Oak, Italian Oak, Forest Green Oak42
Quercus fruticosa 32
Quercus gambeliiShin Oak, Gambel oak, Rocky Mountain White Oak32
Quercus garryanaOregon White Oak, Garry Oak22
Quercus glaucaRing-cup oak , Ring Cupped Oak, Blue Japanese Oak32
Quercus hispanica 32
Quercus ilexHolly Oak, Evergreen Oak52
Quercus ilex ballotaHolm Oak52
Quercus imbricariaShingle Oak, Northern Laurel Oak22
Quercus infectoriaAleppo Oak, Oak22
Quercus ithaburensis macrolepisValonia Oak42
123
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Expert comment
 
Author
Torr.
Botanical References
82200
Links / References
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Readers comment
 
Elizabeth H.
Michael Martin Melendrez Sun Mar 18 2007
I'm a professional plant physiologist and the owner of the oldest and largest native tree farming company in the Southwest, based out of Los Lunas, New Mexico. Concerning Q. emory there are some errors on this web site I’d like to correct. First, the plant is completely intolerant of heavy soil such as clay and is also intolerant of alkaline soils or a pH greater than 6.5. It is a mycorrhizal obligate plant which means it must have the proper mutualistic association of mycorrhizae on its roots or it cannot mature into a healthy plant. It is found native in the Southwestern Mountains of New Mexico up to about 6500 feet elevation with native New Mexican stands surviving undamaged low temperatures of minus 22 F in these mountains. Therefore it can easily be planted in zones colder than USDA 7. If taken from Arizona, Texas or Mexico provenances it will be less cold tolerant. It’s a rapid growing tree as are all the Southwestern native oaks, with new top growth of 3 to 4 feet being typical, even in the wild.
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Subject : Quercus emoryi  

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