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Malus fusca

Common name:	Oregon Crab	Family:	Rosaceae
Author:	(Raf.)Schneid.	Botanical references:	60, 200
Synonyms:	Malus rivularis (M.Roem.)
Known Hazards:	All members of this genus contain the toxin hydrogen cyanide in their seeds and possibly also in their leaves, but not in their fruits. Hydrogen cyanide is the substance that gives almonds their characteristic taste but it should only be consumed in very small quantities. Apple seeds do not normally contain very high quantities of hydrogen cyanide but, even so, should not be consumed in very large quantities. In small quantities, hydrogen cyanide has been shown to stimulate respiration and improve digestion, it is also claimed to be of benefit in the treatment of cancer. In excess, however, it can cause respiratory failure and even death.
Range:	Western N. America - Alaska to California.
Habitat:	Moist woods, stream banks, swamps and bogs in deep rich soils[60, 82], usually occurring in dense pure thickets[229].
Edibility Rating (1-5):	3	Medicinal Rating (1-5):	2

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	M. diversifolia[B,G,P] M. fusca var. diversifolia[G] M. fusca var. levipes[B,P] Pyrus diversifolia[G] Pyrus fusca[B,G,P] Pyrus rivularis[B,G,P]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Oregon Crabapple [B,P],
Epithets:	From a Dictionary of Botanical Epithets
	fusca = dark;
Systematics:	From a USDA Plants Database
	Order: Rosales. Rose family

Physical Characteristics

A decidious tree growing to 12m at a slow rate. It is hardy to zone 6 and is not frost tender. It is in flower in May. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. It is noted for attracting wildlife. We rate it 3/5 for edibility and 2/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils, requires well-drained soil and can grow in heavy clay soil. The plant prefers acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It requires moist soil.

Habitats and Possible Locations

Woodland, Secondary, Sunny Edge, Dappled Shade.

Edible Uses

Fruit; Pectin.

Fruit - raw or cooked[11, 101]. Up to 2cm in diameter[229]. An agreeable sub-acid taste, it can be eaten out of hand or made into jellies, preserves etc[183]. The fruit can be left on the tree until there have been some autumn frosts, this will soften the fruit and make it somewhat less acid[K]. The fruit is rich in pectin so it can be added to pectin-low fruits when making jams or jellies[183, 257]. Pectin is also said to protect the body against radiation[201].

Medicinal Uses

Disclaimer

Antirheumatic; Astringent; Diuretic; Laxative; Ophthalmic; Pectoral; Skin; Stomachic; TB; Tonic.

Oregon crab was employed medicinally by several native North American Indian tribes who used it to treat a variety of complaints[257]. In particular, it gained a reputation with some tribes as a heal-all, especially useful for treating any of the internal organs[257]. It is little, if at all, used in modern herbalism.
The trunk, bark and inner bark are antirheumatic, astringent, blood purifier, cardiac, diuretic, laxative and tonic[257]. A decoction has been used in the treatment of coughs, stomach ulcers, dysentery, diarrhoea, rheumatism and consumption[257]. The shredded bark has been used to treat blood spitting[257]. A poultice of the chewed bark has been applied to wounds[257]. An infusion of the bark is used as an eyewash[257]. a decoction of the bark is used as a wash on cuts, eczema and other skin problems[257].
An infusion of the bark, combined with wild cherry bark (Prunus sp.) has been used as a cure-all tonic[257].
The juice scraped from the peeled trunk has been used as an eye medicine[257].
The soaked leaves have been chewed in the treatment of lung problems[257].

Other Uses

Pectin; Wood.

The fruit is a source of pectin[183].
Wood - hard, close grained, durable. Used for mallets, tool handles and bearings[11, 82, 99, 101, 226].

Cultivation details

An easily grown plant, it succeeds in most fertile soils, preferring a moisture retentive well-drained loamy soil[1, 200]. Grows well in heavy clay soils. Prefers a sunny position but succeeds in partial shade, though it fruits less well in such a situation[200].
A very ornamental plant[1], it is slow-growing in the wild[229].
Hybridizes freely with other members of this genus[200].
The fruit is a good wildlife food source, especially for birds[200].
Plants in this genus are notably susceptible to honey fungus[200].

Propagation

Seed - best sown as soon as it is ripe in the autumn in a cold frame. It usually germinates in late winter. Stored seed requires stratification for 3 months at 1°c and should be sown in a cold frame as soon as it is received[200]. It might not germinate for 12 months or more. Prick out the seedlings into individual pots as soon as they are large enough to handle. If given a rich compost they usually grow away quickly and can be large enough to plant out in late summer, though consider giving them some protection from the cold in their first winter. Otherwise, keep them in pots in a cold frame and plant them out in late spring of the following year.
Cuttings of mature wood, November in a frame[11].

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

PFAF Web Pages

This plant is mentioned in the following web pages

Web References

[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[C] Taxon data. from the CalFlora database.
Images from the CalPhoto database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[11] Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray 1981
A classic with a wealth of information on the plants, but poor on pictures.

[60] Hitchcock. C. L. Vascular Plants of the Pacific Northwest. University of Washington Press 1955
A standard flora for Western N. America with lots of information on habitat etc. Five large volumes, it is not for the casual reader.

[82] Sargent. C. S. Manual of the Trees of N. America. Dover Publications Inc. New York. 1965 ISBN 0-486-20278-X
Two volumes, a comprehensive listing of N. American trees though a bit out of date now. Good details on habitats, some details on plant uses. Not really for the casual reader.

[99] Turner. N. J. Plants in British Columbian Indian Technology. British Columbia Provincial Museum 1979 ISBN 0-7718-8117-7
Excellent and readable guide.

[101] Turner. N. J. and Szczawinski. A. Edible Wild Fruits and Nuts of Canada. National Museum of Natural Sciences 1978
A very readable guide to some wild foods of Canada.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[201] Allardice.P. A - Z of Companion Planting. Cassell Publishers Ltd. 1993 ISBN 0-304-34324-2
A well produced and very readable book.

[226] Lauriault. J. Identification Guide to the Trees of Canada Fitzhenry and Whiteside, Ontario. 1989 ISBN 0889025649
Very good on identification for non-experts, the book also has a lot of information on plant uses.

[229] Elias. T. The Complete Trees of N. America. Field Guide and Natural History. Van Nostrand Reinhold Co. 1980 ISBN 0442238622
A very good concise guide. Gives habitats, good descriptions, maps showing distribution and a few of the uses. It also includes the many shrubs that occasionally reach tree proportions.

[257] Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998 ISBN 0-88192-453-9
Very comprehensive but terse guide to the native uses of plants. Excellent bibliography, fully referenced to each plant, giving a pathway to further information. Not for the casual reader.

Readers Comments

Plant Passporting

Rich (michael@thewitchshaven.com) Wed Sep 26 16:58:15 2001

This information has been taken from DEFRA Guide to Plant Passporting. Which places restrictions on plants which can be traded in the UK and the EU mainly because they are carriers for pests and diseases.

Beta vulgaris (Beet), Chaenomeles (Ornamental quince, Japonica), Citrus (Orange, lemon, lime, grapefruit, etc.), Cotoneaster (Cotoneaster), Crataegus (Hawthorn), Cydonia (Quince), Eriobotrya (Includes loquat), Fortunella and hybrids (Kumquat), Humulus lupulus (Hop (including ornamentals)), Malus (Apple (including ornamentals)), Mespilus (Medlar), Poncirus and hybrids (Ornamental citrus), Prunus (other than Prunus laurocerasus and Prunus lusitanica) (Includes almond, apricot, cherry, damson, greengage, nectarine, peach, plum, sloe and ornamental/flowering varieties), Pyracantha (Firethorn), Pyrus (Pear (including ornamentals)), Solanum (stolon or tuber forming types) (Potato), Sorbus (other than Sorbus intermedia) (Includes rowan and whitebeam), Stranvaesia (Stranvaesia), Vitis (Grape, includes grape vine and ornamental grape).

Many other plants require pasporting for commercial growers, these include Abies, Allium ascalonicum, Allium cepa, Allium porrum, Allium schoenoprasum, Apium graveolens, Plants of the family Araceae, Argyranthemum, Aster, Brassica, Castanea, Capsicum annuum, Cucumis, Dendranthema, Dianthus and hybrids, Euphorbia, Exacum, Fragaria, Gerbera, Gypsophila, Helianthus annuus, Impatiens (all varieties of New Guinea hybrids), Lactuca, Larix, Leucanthemum, Lupinus, Lycopersicon lycopersicum, Plants of the family Marantaceae, Medicago sativa, Plants of the family Musaceae, Nicotiana, Pelargonium, Persea, Phaseolus, Picea, Pinus, Platanus, Populus, Prunus laurocerasus and Prunus lusitanica, Pseudotsuga, Quercus, Rubus, Plants of the family Solanaceae (other than plants of stolon or tuber forming species of Solanum and their hybrids), Solanum melongena, Spinacia, Plants of the family Strelitziaceae, Tanacetum, Tsuga, Verbena.

Cross references: Plants: Beta vulgaris, Humulus lupulus. Genera: Chaenomeles, Citrus, Cotoneaster, Crataegus, Cydonia, Eriobotrya, Fortunella, Malus, Mespilus, Poncirus, Prunus, Pyracantha, Pyrus, Solanum, Sorbus, Stranvaesia, Vitis.

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Bibliography

Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
WEB search engine by Rich Morris - Home Page- Contact Info
Blagdon Cross, Ashwater, Beaworthy, Devon, EX21 5DF, UK.
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This page (UK) http://www.comp.leeds.ac.uk/cgi-bin/pfaf/arr_html?Malus+fusca
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We make no claims of magical effects or supernatural powers for any item in this catalog. In spite of legendary attributes or occult and craft tradition, such items are offered as curios only and beliefs concerning their magical effectiveness are related only for historical interest.