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Berberis thunbergii

Common name:	Japanese Barberry	Family:	Berberidaceae
Author:	DC.	Botanical references:	11, 58, 200
Synonyms:
Known Hazards:	None known
Range:	E. Asia - C. and S. Japan
Habitat:	Not known
Edibility Rating (1-5):	2	Medicinal Rating (1-5):	2

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	B. thunbergii var. atropurpurea[B]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Hsiao Po [E], Japanese Barberry [H,DEN1,B,P,L], Megi [E], Shan Shih Liu [E], Tzu Po [E],
Systematics:	From a USDA Plants Database
	Order: Ranunculales. Barberry family
Other Range Info:	From the Ethnobotany Database
	China
Noxious, Invasive and Injurious Weeds	From USDA PLANTS database, Weeds Australia , DEFRA Injurious Weeds
	Listed as noxious/invasive for: USA Invasive.

Physical Characteristics

A decidious shrub growing to 2m by 3m at a medium rate. It is hardy to zone 4 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. The plant is self-fertile. We rate it 2/5 for edibility and 2/5 for medicinal use.

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

Habitats and Possible Locations

Hedge, Woodland, Dappled Shade, Shady Edge, Ground Cover.

Edible Uses

Fruit; Leaves.

Fruit - raw or cooked[105, 177]. Dry with a very poor flavour[K]. The fruits are about 8mm long[200].
Leaves - cooked.

Medicinal Uses

Disclaimer

Anthelmintic; Antibacterial; Antiseptic; Cancer; Febrifuge.

The root bark is anthelmintic, antiseptic and febrifuge[178].
Berberine, universally present in rhizomes of Berberis species, has marked antibacterial effects. Since it is not appreciably absorbed by the body, it is used orally in the treatment of various enteric infections, especially bacterial dysentery[218]. It should not be used with Glycyrrhiza species (Liquorice) because this nullifies the effects of the berberine[218]. Berberine has also shown antitumour activity[218].

Other Uses

Dye; Ground cover; Hedge.

Plants can be grown as a medium-size hedge[29]. They are very tolerant of trimming and have prickles which make them an effective barrier to larger creatures[K].
The cultivar 'Atropurpurea Nana' can be used for ground cover[208]. It makes a dense covering when planted 30cm apart each way[208].
A yellow dye is obtained from the root and branches[178].

Cultivation details

Prefers a warm moist loamy soil but it is by no means fastidious, succeeding in thin, dry and shallow soils[11, 200]. Prefers a lime-free soil according to one report[182]. Grows well in heavy clay soils. Succeeds in full sun or light shade[11, 200].
Plants are hardy to about -25°c[184].
A commonly grown ornamental plant, there are many named varieties[182].
Plants can be pruned back quite severely, they resprout well from the base[200].
Unlike most other members of this genus, this plant does not usually hybridize with other species[67].
An alternate host of 'black-stem rust' of wheat so it has been extensively grubbed up from its habitats.
This species is notably resistant to honey fungus[200].

Propagation

Seed - best sown as soon as it is ripe in a cold frame, when it should germinate in late winter or early spring[78]. Seed from over-ripe fruit will take longer to germinate[78], whilst stored seed may require cold stratification and should be sown in a cold frame as early in the year as possible[80]. The seedlings are subject to damping off, so should be kept well ventilated[113]. When the seedlings are large enough to handle, prick them out into individual pots and grow them on in a cold frame. If growth is sufficient, it can be possible to plant them out into their permanent positions in the autumn, but generally it is best to leave them in the cold frame for the winter and plant them out in late spring or early summer of the following year.
Cuttings of half-ripe wood, July/August in a frame. Fairly easy[11].
Cuttings of mature wood of the current season's growth, preferably with a heel, October/November in a frame[78]. Fairly easy[11]

Cultivars

'Atropurpurea Nana': A low growing form to about 60cm tall with reddish-purple leaves[11, 200], it can be used for ground cover[208]. It makes a dense covering when planted 30cm apart each way[208].

Suppliers

Plants For A Future is working with the following groups to try and make these plants easily available. Parts of the proceeds will be donated to so please mention us when ordering.

Cool Temperate Nurseries: 10 Ivy Grove
Nottingham
NG7 7LZ
Email: philcorbett53@hotmail.com
Phone 0115 847 8302 Fax 0115 847 8302
Distribution: UK
How to order: Direct from Cool Temperate by email/phone
Notes: Many Trees supplied on their own rootstock
Last Updated: April 03
Item: Berberis thunbergii (Japanese barberry)

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

[H] Details of Scandanavian and European Common names in Henriette's names database
[L] Scientific and Common Names (some photos) from Lepidoptera and some other life forms
[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.
[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.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[DEN] Data _ Photos (Good Identification info) from the Virginia Tech's Dendrology Deptarments' Tree Fact Sheets.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for the family Berberidaceae.

To be included in the Flora of China.

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.

[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.

[29] Shepherd. F.W. Hedges and Screens. Royal Horticultural Society. 1974 ISBN 0900629649
A small but informative booklet giving details of all the hedging plants being grown in the R.H.S. gardens at Wisley in Surrey.

[58] Ohwi. G. Flora of Japan. (English translation) Smithsonian Institution 1965
The standard work. Brilliant, but not for the casual reader.

[67] Ahrendt. Berberis and Mahonia. Journal of the Linnean Society, 57 1961
Not for the casual reader, it lists all the known species in these two genera together with botanic descriptions and other relevant details for the botanist.

[78] Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co 1948
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.

[80] McMillan-Browse. P. Hardy Woody Plants from Seed. Grower Books 1985 ISBN 0-901361-21-6
Does not deal with many species but it is very comprehensive on those that it does cover. Not for casual reading.

[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.

[113] Dirr. M. A. and Heuser. M. W. The Reference Manual of Woody Plant Propagation. Athens Ga. Varsity Press 1987 ISBN 0942375009
A very detailed book on propagating trees. Not for the casual reader.

[177] Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books 1984 ISBN 3874292169
An excellent book for the dedicated. A comprehensive listing of latin names with a brief list of edible parts.

[178] Stuart. Rev. G. A. Chinese Materia Medica. Taipei. Southern Materials Centre
A translation of an ancient Chinese herbal. Fascinating.

[182] Thomas. G. S. Ornamental Shrubs, Climbers and Bamboos. Murray 1992 ISBN 0-7195-5043-2
Contains a wide range of plants with a brief description, mainly of their ornamental value but also usually of cultivation details and varieties.

[184] Phillips. R. & Rix. M. Shrubs. Pan Books 1989 ISBN 0-330-30258-2
Excellent photographs and a terse description of 1900 species and cultivars.

[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.

[208] Thomas. G. S. Plants for Ground Cover J. M. Dent & Sons 1990 ISBN 0-460-12609-1
An excellent detailled book on the subject, very comprehensive.

[218] Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. 1985 ISBN 0-917256-20-4
Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.

Readers Comments

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