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Rhus sempervirens

Common name:   Family: Anacardiaceae
Author: Scheele. Botanical references: 227
Synonyms:  
Known Hazards: There are some suggestions that the sap of this species can cause a skin rash in susceptible people, but this has not been substantiated. See also notes in 'Cultivation Details'.
Range: Southern N. America - Texas, New Mexico and Mexico.
Habitat: Dry slopes[181], rocky hillsides and cliffs, 600 - 2250 metres[149].
Edibility Rating (1-5): 2Medicinal Rating (1-5):1

Other Common Names:From various places around the Web, may not be correct. See below.
Evergreen Sumach [E],
Epithets:From a Dictionary of Botanical Epithets
sempervirens = evergreen; virens = green;
Systematics:From a USDA Plants Database
Order: Sapindales. Sumac family
Other Range Info: From the Ethnobotany Database
Mexico(Kickapoo); Us(Amerindian)

Physical Characteristics

An evergreen shrub growing to 3.5m. It is frost tender. It is in leaf all year, in flower from July to August, and the seeds ripen from September to October. The flowers are 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 are pollinated by Bees. The plant not is self-fertile. 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 cannot grow in the shade. It requires dry or moist soil.

Habitats and Possible Locations

Woodland, Sunny Edge.

Edible Uses

Drink; Fruit.

Fruit - raw or cooked[149]. The fruit is small with very little flesh, but it is produced in fairly large panicles and so is easily harvested. When soaked for 10 - 30 minutes in hot or cold water it makes a very refreshing lemonade-like drink (without any fizz of course)[149]. The mixture should not be boiled since this will release tannic acids and make the drink astringent.

Medicinal Uses

Disclaimer

Antiasthmatic.

The leaves are used in domestic medicine for relieving asthma[227].
Some caution is advised in the use of the leaves and stems of this plant, see the notes above on toxicity.

Other Uses

Dye; Mordant; Oil.

An oil is extracted from the seeds[4]. 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 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].

Cultivation details

We have very little information on the hardiness of this species and do not know if it will succeed outdoors in Britain. It is unlikely to succeed anywhere outside the mildest areas of the country. The following notes are based on the general needs of the genus.
Succeeds in a well-drained fertile soil in full sun[11, 200].
The young growth in spring can be damaged by late frosts.
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].
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 such as this one 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[1, 4]. The toxic species are sometimes separated into their own genus, Toxicodendron, by some botanists[200].
Dioecious. Male and female plants must be grown if seed is required.

Propagation

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[200]. This soak water can be drunk and has a delicious lemon-flavour. The stored seed also needs hot water treatment and can be sown in early spring in a cold frame[200]. 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[200].
Root cuttings 4cm long taken in December and potted up vertically in a greenhouse. Good percentage[78, 200].
Suckers in late autumn to winter[200].

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 Anacardiaceae.

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]).

[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.

[149] Vines. R. A. Trees of Central Texas. University of Texas Press 1987 ISBN 0-292-78958-3
Fairly readable, it gives details of habitats and some of the uses of trees growing in Texas.

[169] Buchanan. R. A Weavers Garden.
Covers all aspects of growing your own clothes, from fibre plants to dyes.

[181] Pesman. M. W. Meet Flora Mexicana. Dale S. King. Arizona. 1962
Very readable flora but rather lacking botanically. A few notes on useful plants.

[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.

[227] Vines. R.A. Trees of North Texas University of Texas Press. 1982 ISBN 0292780206
A readable guide to the area, it contains descriptions of the plants and their habitats with quite a bit of information on plant uses.


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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
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