Rhus sylvestris
Family: Anacardiaceae
What it is like
Rhus sylvestris is a deciduous Tree growing to 10 m (32ft 10in). It is frost tender. It is in flower from May to June, and the seeds ripen from August to October. The species is dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required). and is pollinated by Bees. The plant is not self-fertile. 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 cannot grow in the shade. It prefers moist soil.
Height (m): 10
Where it is found
Low mountains, C. and S. Japan. Forests at elevations of 140 - 800 (occasionally to 2300) metres in Guangdong, Guangxi, NW Yunnan, Sichuan, Guizhou, Hunan and Hubei Provinces, China.
E. Asia - China, Japan, Korea.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 0
Oil: Oil
Medicine
Rating: 0
Other
Rating:
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. An oil is extracted from the seeds. It attains a tallow-like consistency on standing and is used to make candles. These burn brilliantly, though they emit a pungent smoke. A lacquer is obtained from the sap of this plant. This species does not yield a varnish.
Dye: Plants that provide dyes.
Lacquer: A type of varnish.
Mordant: Used for making a dye more permanent, it also affects the colour of the dye.
Oil: Vegetable oils have many uses, as lubricants, lighting, soap and paint making, waterproofing etc. This does not include the edible oils unless they are also mentioned as having other uses.
Wax: Used for making candles etc.
How it is grown
Succeeds in a well-drained fertile soil in full sun. The young growth in spring can be damaged by late frosts. Plants have brittle branches and these can be broken off in strong winds. Plants are also susceptible to coral spot fungus. Plants in this genus are notably resistant to honey fungus. Many of the species in this genus are highly toxic and can also cause severe irritation to the skin of some people, whilst other species are not poisonous. It is relatively simple to distinguish which is which, the poisonous species have axillary panicles and smooth fruits whilst non-poisonous species have compound terminal panicles and fruits covered with acid crimson hairs. The toxic species are sometimes separated into their own genus, Toxicodendron, by some botanists. Dioecious. Male and female plants must be grown if seed is required.
Propagating it: Seed - best sown in a cold frame as soon as it is ripe. 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. The stored seed also needs hot water treatment and can be sown in early spring in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter. 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, July/August in a frame. Root cuttings 4cm long taken in December and potted up vertically in a greenhouse. Good percentage. Suckers in late autumn to winter.
Best place to grow: Woodland Garden Canopy; Secondary;
Habit: Tree
Hardiness:
Growth:
Soil: Light (sandy), medium, heavy (clay)
Shade: No shade
Moisture: Moist
Things to keep in mind
This plant contains toxic substances which can cause severe irritation to some people. The fresh sap causes skin blisters.