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Gaultheria japonica

Common name:	Creeping Snowberry	Family:	Ericaceae
Author:	(A.Gray.)Sleumer.	Botanical references:	11, 200, 275
Synonyms:
Known Hazards:	None known
Range:	E. Asia - central and northern Japan.
Habitat:	Mossy grounds under conifers at elevations of 1600 - 2000 metres[275].
Edibility Rating (1-5):	4	Medicinal Rating (1-5):	1

Systematics:	From a USDA Plants Database
	Order: Ericales. Heath family

Physical Characteristics

An evergreen shrub growing to 0.1m by 1m at a fast rate. It is hardy to zone 6. It is in leaf all year, in flower from May to June, and the seeds ripen from August to September. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. We rate it 4/5 for edibility and 1/5 for medicinal use.

The plant prefers light (sandy) and medium (loamy) soils. The plant prefers acid and neutral soils and can grow in very acid soil. It can grow in semi-shade (light woodland). It requires moist or wet soil.

Edible Uses

Fruit Leaves Tea.

Fruit - raw or cooked. Pleasantly acid and refreshing[3, 101], with a delicate flavour of wintergreen[183]. An agreeable sub-acid taste, similar to G. shallon[2, 11]. They can be made into delicious preserves[183]. The fruit is about 6mm in diameter[200].
Leaves - raw or cooked[207].
The leaves are used to make a tea[2, 95, 161, 257]. A mild flavour of wintergreen[183]. Said to be superior to china tea[207].

Medicinal Uses

Disclaimer

Cancer.

The plant is said to remove the cancerous taint from the body[4].
An infusion of the leaves has been used as a tonic for a person who has overeaten[257].

Other Uses

Ground cover.

A useful fast growing ground cover plant for shady positions.

Cultivation details

Prefers a moist but not boggy humus rich soil in shade or semi-shade[11]. A peat and moisture loving species, it requires a lime-free soil[11].
A fast growing plant[200]. The plant can make a good nesting place for mice, these mice then eat the bark of the stems in winter causing die-back.
Plants in this genus are notably resistant to honey fungus[200].
Gaultheria japonica bears a close resemblance to G. hispidula (L.) Bigelow of N. America and sometimes treated as a variety or subspecies of the latter. G. japonica, however, has calyx much longer than the bracteoles, ovate and acute calyx lobes, and shorter anther projections. In G. hispidula the calyx is as long as or slightly longer than the bracteoles, the calyx lobes are broadly ovate and obtuse or subacute, and the anthers have distinct projections.

Propagation

The seed requires a period of cold stratification. Pre-chill for 4 - 10 weeks and then surface sow in a lime-free compost in a shady part of the greenhouse and keep the compost moist[78]. The seed usually germinates well, usually within 1 - 2 months at 20° c, but the seedlings are liable to damp off. It is important to water them with care and to ensure that they get plenty of ventilation. Watering them with a garlic infusion can also help to prevent damping of[K]. Prick out the seedlings into individual pots when they are about 25mm tall and grow them on in light shade in the greenhouse for at least their first winter[K]. Plant them out in late spring or early summer. The seedlings are susceptible to spring frosts so might need some protection for their first few years outdoors. The leaves remain very small for the first few years[11].
Cuttings of half-ripe wood 3 - 6cm long, July/August in a frame in a shady position. They form roots in late summer or spring[78]. A good percentage usually take.
Division in spring just before new growth begins[200]. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.
Layering.

Suppliers

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

Web References

References for the family Ericaceae.

[CHINA] Draft Data for parts of family Very detailed botanical/identification info. from 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.

[2] Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications 1972 ISBN 0-486-20459-6
Lots of entries, quite a lot of information in most entries and references.

[3] Simmons. A. E. Growing Unusual Fruit. David and Charles 1972 ISBN 0-7153-5531-7
A very readable book with information on about 100 species that can be grown in Britain (some in greenhouses) and details on how to grow and use them.

[4] Grieve. A Modern Herbal. Penguin 1984 ISBN 0-14-046-440-9
Not so modern (1930's?) but lots of information, mainly temperate plants.

[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.

[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.

[95] Saunders. C. F. Edible and Useful Wild Plants of the United States and Canada. Dover Publications 1976 ISBN 0-486-23310-3
Useful wild plants of America. A pocket 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.

[161] Yanovsky. E. Food Plants of the N. American Indians. Publication no. 237. U.S. Depf of Agriculture.
A comprehensive but very terse guide. Not for the casual reader.

[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.

[207] Coffey. T. The History and Folklore of North American Wild Flowers. Facts on File. 1993 ISBN 0-8160-2624-6
A nice read, lots of information on plant uses.

[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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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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