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Rubus macropetalus

Common name:	California Blackberry	Family:	Rosaceae
Author:	Douglas. ex Hook.	Botanical references:	11, 71
Synonyms:	Rubus ursinus macropetalus ((Douglas. ex Hook.)Taylor.&MacBryde.)
Known Hazards:	None known
Range:	Western N. America - British Columbia to California.
Habitat:	Field banks and disturbed areas below 1300 metres in California[71].
Edibility Rating (1-5):	2	Medicinal Rating (1-5):	1

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	R. ursinus ssp. macropetalus[B,P] R. ursinus var. macropetalus[B,P]
Other Common Names:	From various places around the Web, may not be correct. See below.
	California Blackberry [P],
Epithets:	From a Dictionary of Botanical Epithets
	macropetalus = large petals;
Systematics:	From a USDA Plants Database
	Order: Rosales. Rose family
Noxious, Invasive and Injurious Weeds	From USDA PLANTS database, Weeds Australia , DEFRA Injurious Weeds
	Listed as noxious/invasive for: Tasmaina.

Physical Characteristics

A decidious shrub. . The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. We rate it 2/5 for edibility and 1/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained 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, Sunny Edge.

Edible Uses

Fruit; Tea.

Fruit - raw or cooked[71, 105, 257]. It can also be dried for later use[118].
The fresh or dried leaves can be used to make a tea[257].

Medicinal Uses

Disclaimer

Stomachic.

An infusion of the leaves has been used in the treatment of stomach complaints[257].

Other Uses

Dye.

A purple to dull blue dye is obtained from the fruit[168].

Cultivation details

Easily grown in a good well-drained loamy soil in sun or semi-shade[1, 11, 200].
Sometimes cultivated for its edible fruit, there are some named forms[71].
Plants in this genus are notably susceptible to honey fungus[200].

Propagation

Seed - requires stratification and is best sown in early autumn in a cold frame. Stored seed requires one month stratification at about 3°c and is best sown as early as possible in the year. Prick out the seedlings when they are large enough to handle and grow on in a cold frame. Plant them out into their permanent positions in late spring of the following year.
Cuttings of half-ripe wood, July/August in a frame[200].
Tip layering in July. Plant out in autumn.
Division in early spring or just before leaf-fall in the autumn[200].

Cultivars

'': No entries have been made for this species as yet.

Suppliers

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

Web References

[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for Rubus ursinus ssp. macropetalus (a possible synonym).

[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.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants 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

[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.

[71] Munz. A California Flora. University of California Press 1959
An excellent flora but no pictures. Not for the casual reader.

[105] Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing 1976
The most comprehensive guide to 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.

[118] Gunther. E. Ethnobotany of Western Washington. University of Washington Press 1981 ISBN 0-295-95258-X
A small book, it is a good guide to useful plants in Western N. America.

[168] Grae. I. Nature's Colors - Dyes from Plants. MacMillan Publishing Co. New York. 1974 ISBN 0-02-544950-8
A very good and readable book on dyeing.

[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.

[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

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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.
Website: www.pfaf.org Phone: 0845 458 4719/_44(0) 1208 872963

This page (UK) http://www.comp.leeds.ac.uk/cgi-bin/pfaf/arr_html?Rubus+macropetalus
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