Quercus bicolor
| Quercus bicolor | |
| Light: |   |
| Moisture: |   |
| Hardiness: | 4 |
| Soil pH: | 5.6-8.4 |
| Height: | 82' |
| Blooms: | Late Spring |
| Open Woods Forest | |
| Native to: | |
| Edible Rating: |  |
| Medicinal Rating: |  |
| Tea: | Yes |
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Quercus bicolor (common name: swamp white oak)
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[1]. Trees should not be left in a nursery bed for more than 2 growing seasons without being moved or they will transplant very badly.
Cultivation: Prefers a good deep fertile loam which can be on the stiff side[2][1]. Young plants tolerate reasonable levels of side shade[3]. Tolerates moderate exposure, surviving well but being somewhat stunted[3].
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[3].
A relatively fast-growing tree in the wild, living 300 - 350 years[4], though it is relatively shallow-rooted and is considerably more susceptible to forest fires than most other oaks[5]. This species is one of the best of the white oaks for growing in this country[2]. However, it is said that the seed is rarely formed in Britain[6]. The tree flowers on new growth produced in spring, the seed ripening in its first year[3][4]. Trees do not commence bearing until about 25 - 30 years old, large crops being produced every 3 - 5 years[4].
Intolerant of root disturbance, trees should be planted in their permanent positions whilst young[1].
The seed of this species is attached to the tree by unusually long (by oak tree standards) stems[7].
Hybridizes freely with other members of the genus[3].
Plants in this genus are notably resistant to honey fungus[3].
Range: Eastern N. America - Quebec to Minnesota, Georgia and Arkansas.
Habitat: Bottomlands, stream margins and swamps[8]. Tolerant of poorly drained sites, it is frequently found in heavy mucky soils[4].
Edibility: Seed - raw or cooked[6][9][5]. A rather sweet flavour[10][11]. The seed is quite large, about 2 - 3cm long and 15 - 20mm wide[12][3], and unlike most other oaks, is attached to the tree by a long stem[7]. It matures in its first year[11]. The seed can be dried, ground into a powder and used as a thickening in stews etc or mixed with cereals for making bread[7]. The seed from some trees can contain 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.
Roasted seed is a coffee substitute.
Medicinal: Any galls produced on the tree are strongly astringent and can be used in the treatment of haemorrhages, chronic diarrhoea, dysentery etc[13].
Usage: A mulch of the leaves repels slugs, grubs etc, though fresh leaves should not be used as these can inhibit plant growth.
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[13].
The bark has been boiled with hemlock (Tsuga sp.?) and soft maple bark (Acer spp), and the liquid used to remove rust. he mixture was also believed to prevent rust[14].
Wood - close-grained, strong, hard, tough, heavy[15][12][16][4]. It weighs 48lb per cubic foot[11]. Trees do not self-prune and dead branches remain on the trees for many years. This does mean that the wood is usually quite knotty[5]. The wood is of some importance commercially, it is used for construction, furniture, interior finishes etc, as well as for fencing and fuel[15][12][16][4].
Pollinators: Wind
Soil: Can grow in medium and heavy soils.
Wind: Tolerates strong winds
Seed Ripens: Mid Fall
Flower Type: Monoecious
Heavy Clay: Grows in heavy-clay soils.
Links
References
- ↑ 1.0 1.1 1.2 Bean, William. Trees and Shrubs Hardy in Great Britain. Murray, 1981.
- ↑ 2.0 2.1 Chittendon, Fred. RHS Dictionary of Plants. Oxford University Press, 1951.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Huxley, Anthony. The New Royal Horticultural Society Dictionary of Gardening. MacMillan Press, 1992.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Elias, Thomas. The Complete Trees of North America. Van Nostrand Reinhold, 1980.
- ↑ 5.0 5.1 5.2 Lauriault, Jean. Identification Guide to the Trees of Canada. Fitzhenry and Whiteside, 1989.
- ↑ 6.0 6.1 Tanaka, Tyōzaburō. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing, 1976.
- ↑ 7.0 7.1 7.2 Facciola, Stephen. Cornucopia - A Source Book of Edible Plants. Kampong Publications, 1990.
- ↑ Lyndon, Merritt. Gray's Manual of Botany. American Book Co, 1950.
- ↑ Yanovsky, Elias. Food Plants of the North American Indians Publication 237. US Department of Agriculture.
- ↑ McPherson, Alan and Sue McPherson. Wild Food Plants of Indiana. Indiana University Press, 1977.
- ↑ 11.0 11.1 11.2 Britton, Nathaniel and Addison Brown. An Illustrated Flora of the Northern United States and Canada. Dover Publications, 1970.
- ↑ 12.0 12.1 12.2 Sargent, Charles. Manual of the Trees of North America. Dover, 1965.
- ↑ 13.0 13.1 Grieve, Margaret. A Modern Herbal. Penguin, 1984.
- ↑ Moerman, Daniel. Native American Ethnobotany. Timber Press, 1998.
- ↑ 15.0 15.1 Uphof, Johannes. Dictionary of Economic Plants. Weinheim, 1959.
- ↑ 16.0 16.1 Hill, Albert. Economic Botany. The Maple Press, 1952.