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Toxicodendron sylvestre - (Siebold & Zucc.) Kuntze

Common Name Yame-haze
Family Anacardiaceae
USDA hardiness 9-12
Known Hazards Species in the genus Toxicodendron are known to contain resinous phenolic compounds known as urushiols that can cause severe skin problems in humans. Direct contacr with the plant, exposure to smoke or fumes from a burning plant or even contact with pets, animals or cothing that have touched the plant can cause severe allergic dermatitis in some individuals. There is usually a latent period of about 12 - 24 hours from the moment of contact, this is followed by a reddening and severe blistering of the skin. Even plant specimens 100 or more years old have been known to cause problems [274 ]. The plant does not cause skin problems with wildlife or livestock - the foliage and fruits are eaten by several other species of animals and birds - though some pets are sensitive to it [1050 ].
Habitats Low mountains, C. and S. Japan [58 ]. Lowland, hill and mountain forests; at elevations from 100 - 800 metres, occasionally to 2,300 metres [266 ].
Range E. Asia - southern China, central and southern Japan, Korea.
Edibility Rating    (0 of 5)
Other Uses    (4 of 5)
Weed Potential No
Medicinal Rating    (0 of 5)
Care (info)
Half Hardy Moist Soil Semi-shade Full sun
Toxicodendron sylvestre Yame-haze

harum.koh wikimedia.org
Toxicodendron sylvestre Yame-haze
harum.koh wikimedia.org


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Physical Characteristics

 icon of manicon of lolypop
Toxicodendron sylvestre is a deciduous Tree growing to 10 m (32ft) by 8 m (26ft) at a medium rate.
See above for USDA hardiness. It is hardy to UK zone 9. The flowers are pollinated by Bees.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map


Rhus sylvestris Siebold & Zucc.

Plant Habitats

Edible Uses

None Known

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

None Known

References   More on Medicinal Uses

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Other Uses

The leaves are rich in tannin. They can be collected as they fall in the autumn and used as a brown dye or as a mordant[169 ]. An oil is extracted from the seeds [4 , 61 ]. It attains a tallow-like consistency on standing and is used to make candles. These burn brilliantly, though they emit a pungent smoke[4 ]. The oblique, compressed drupe is around 8mm x 6 - 7mm, with a thick, waxy mesocarp [266 ]. A lacquer is obtained from the sap of this plant [46 , 61 ]. One report says that this species does not yield a varnish [11 ]. Carbon Farming Solutions - Industrial Crop: oil, gum (Crops grown for non-food uses. Industrial crops provide resources in three main categories: materials, chemicals, and energy. Traditional materials include lumber and thatch, paper and cardboard, and textiles) [1-1].

Special Uses

Carbon Farming

References   More on Other Uses

Cultivation details

Industrial Crop: Gum  Industrial Crop: Oil  Management: Standard  Regional Crop

Climate: cold to warm temperate. Humidity: humid. Toxicodendron sylvestre is only hardy outdoors in the milder regions of the temperaste zone. The young growth in spring is very susceptible to cold and can be damaged by late frosts. Species in this genus generally succeed in a well-drained fertile or moderately fertile soil in full sun or light shade [11 , 200 ]. Plants have brittle branches and these can be broken off in strong winds [200 ]. Plants are also susceptible to coral spot fungus [11 ]. Plants in this genus are notably resistant to honey fungus[200 ]. A dioecious species - both male and female forms must be grown if fruit and seed are required. Carbon Farming Solutions - Cultivation: regional crop. Management: standard (Describes the non-destructive management systems that are used in cultivation) [1-1].

Carbon Farming

  • Industrial Crop: Gum  Used as thickeners and gelling agents. Non-destructively harvested gums come from tapped trees and seed.
  • Industrial Crop: Oil  Materials, chemicals and energy include bioplastics, biomass, glycerin, soaps, lubricants, paints, biodiesel. Oilseed crop types.
  • Management: Standard  Plants grow to their standard height. Harvest fruit, seeds, or other products. Non-Destructive management systems.
  • Regional Crop  These crops have been domesticated and cultivated regionally but have not been adopted elsewhere and are typically not traded globally, Examples in this broad category include perennial cottons and many nuts and staple fruits.

References   Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

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Plant Propagation

Seed. Pre-soak the seed for 24 hours in hot water (starting at a temperature of 80 - 90c and allowing it to cool) prior to sowing in order to leach out any germination inhibitors[200 ]. The stored seed also needs hot water treatment and can be sown in early spring [200 ]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Cuttings of half-ripe wood, 10cm with a heel, mid summer in a frame[200 ]. Root cuttings 4cm long taken in mid-winter and potted up. Good percentage[78 , 200 ]. Suckers in late autumn to winter[200 ].

Other Names

If available other names are mentioned here

Mu la shu. Yame-haze

Native Plant Search

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Found In

Countries where the plant has been found are listed here if the information is available

E. Asia - southern China, central and southern Japan, Korea.

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

None Known

Conservation Status

IUCN Red List of Threatened Plants Status : This taxon has not yet been assessed

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Rhus toxicodendronEastern Poison OakShrub0.6 6-9  LMHNDM022
Toxicodendron vernicifluumLacquer TreeTree15.0 -  LMHNM012

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.


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(Siebold & Zucc.) Kuntze

Botanical References

Links / References

For a list of references used on this page please go here
A special thanks to Ken Fern for some of the information used on this page.

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