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Useful Tropical Plants

Rhus virens

Lindh. ex A.Gray

Anacardiaceae


There has been considerable uncertainty amongst botanists as to the best way of treating the genus Rhus, with some viewing it in a strict sense as comprising of around 35 species and electing to separate the other species into several distinct genera; whilst others prefer to view the genus in a looser sense being comprised of perhaps 250 species grouped into several subgenera. The genus is treated here in its strict sense, with many other species that have at times been included here being moved to the genera Cotinus, Searsia and Toxicodendron.

+ Synonyms

Rhus sempervirens Scheele

Schmaltzia choriophylla (Wooton & Standl.) F.A.Barkley

Schmaltzia virens (Lindh. ex A.Gray) Small

Toxicodendron sempervirens (Lindh. ex A.Gray) Kuntze

Common Name:

No Image.

General Information

Rhus virens is an evergreen shrub with a rounded form and spreading branches; it can grow up to 3.5 metres tall. The lower branches often touch the ground[
149
Title
Trees of Central Texas.
Publication
 
Author
Vines. R. A.
Publisher
University of Texas Press
Year
1987
ISBN
0-292-78958-3
Description
A good concise guide, it gives details of habitats and some of the uses of trees growing in Texas.
].
The plant is harvested from the wild for local use as a food, medicine and source of materials.

Known Hazards

The genus Rhus is being treated in its strict sense here, so it excludes the many species with highly toxic and irritant sap (these are included in Toxicodendron). Although the two genera are very similar, it is relatively simple to distinguish which is which, the poisonous species (Toxicodendron) have axillary panicles and smooth fruits whilst non-poisonous species (Rhus) have compound terminal panicles and fruits covered with acid crimson hairs[
1
Title
RHS Dictionary of Plants plus Supplement. 1956
Publication
 
Author
F. Chittendon.
Publisher
Oxford University Press
Year
1951
ISBN
-
Description
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
,
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
].
Whilst the genus Rhus in this treatment is generally seen as having a non-toxic sap there are some suggestions that the sap of some species in the genus (including this one) can cause a skin rash in susceptible people.

Botanical References

227
Title
Trees of North Texas
Publication
 
Author
Vines. R.A.
Publisher
University of Texas Press.
Year
1982
ISBN
0292780206
Description
A readable guide to the area, it contains descriptions of the plants and their habitats with quite a bit of information on plant uses.
,
1207
Title
Flora del Valle de Tehuacán-Cuicatlán
Publication
 
Author
 
Website
http://www.biodiversitylibrary.org/bibliography/118975#/summary
Publisher
Universidad Nacional Autónoma de México
Year
1993 - 2015
ISBN
968-36-3108-8
Description
An excellent flora (in Spanish) of the Tehuacán-Cuicatlán biosphere reserve in southeastern Mexico. It can be downloaded from the Internet

Range

Southern N. America - Texas, New Mexico and through Mexico to Oaxaca.

Habitat

Dry slopes, rocky hillsides and cliffs; at elevations from 600 - 2,250 metres[
149
Title
Trees of Central Texas.
Publication
 
Author
Vines. R. A.
Publisher
University of Texas Press
Year
1987
ISBN
0-292-78958-3
Description
A good concise guide, it gives details of habitats and some of the uses of trees growing in Texas.
,
181
Title
Meet Flora Mexicana.
Publication
 
Author
Pesman. M. W.
Publisher
Dale S. King. Arizona.
Year
1962
ISBN
-
Description
Very readable flora but rather lacking botanically. A few notes on useful plants.
].

Properties

Edibility Rating *  *
Medicinal Rating *  *
Other Uses Rating *  *
HabitEvergreen Shrub
Height3.50 m
PollinatorsBees
Self-fertileNo
Cultivation StatusOrnamental, Wild

Cultivation Details

Rhus virens is native in warm temperate to tropical, semi-arid regions of southern N. America, where it can be found at elevations up to 2,250 metres. It is unlikely to withstand any more than occasional light frosts[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. The young growth in spring can be damaged by late frosts.
Succeeds in a well-drained fertile soil in full sun[
11
Title
Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
Publication
 
Author
Bean. W.
Publisher
Murray
Year
1981
ISBN
-
Description
A classic with a wealth of information on the plants, but poor on pictures.
,
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Established plants are drought tolerant.
Plants have brittle branches and these can be broken off in strong winds[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Plants are also susceptible to coral spot fungus[
11
Title
Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
Publication
 
Author
Bean. W.
Publisher
Murray
Year
1981
ISBN
-
Description
A classic with a wealth of information on the plants, but poor on pictures.
]. Plants in this genus are notably resistant to honey fungus[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
A dioecious species - both male and female forms must be grown if fruit and seed are required.

Edible Uses

Fruit - raw or cooked[
149
Title
Trees of Central Texas.
Publication
 
Author
Vines. R. A.
Publisher
University of Texas Press
Year
1987
ISBN
0-292-78958-3
Description
A good concise guide, it gives details of habitats and some of the uses of trees growing in Texas.
]. 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
Title
Trees of Central Texas.
Publication
 
Author
Vines. R. A.
Publisher
University of Texas Press
Year
1987
ISBN
0-292-78958-3
Description
A good concise guide, it gives details of habitats and some of the uses of trees growing in Texas.
]. The mixture should not be boiled since this will release tannic acids and make the drink astringent. The individual, subglobose fruits are quite small, around 8 - 10mm long and with very little flesh, but they are produced in clusters and are easily harvested[
149
Title
Trees of Central Texas.
Publication
 
Author
Vines. R. A.
Publisher
University of Texas Press
Year
1987
ISBN
0-292-78958-3
Description
A good concise guide, it gives details of habitats and some of the uses of trees growing in Texas.
,
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

Medicinal

The leaves are used in domestic medicine for relieving asthma[
227
Title
Trees of North Texas
Publication
 
Author
Vines. R.A.
Publisher
University of Texas Press.
Year
1982
ISBN
0292780206
Description
A readable guide to the area, it contains descriptions of the plants and their habitats with quite a bit of information on plant uses.
].

Some caution is advised in the use of the leaves and stems of this plant, see the notes above on toxicity.

Other Uses

An oil is extracted from the seeds[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
]. It attains a tallow-like consistency on standing and is used to make candles. These burn brilliantly, though they emit a pungent smoke[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
].

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
Title
A Weavers Garden
Publication
 
Author
Buchanan. R.
Publisher
McGraw-Hill Contemporary
Year
1987
ISBN
0934026289
Description
Covers all aspects of growing your own clothes, from fibre plants to dyes.
].

Propagation

Seed - best sown 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
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. This soak water can be drunk and has a delicious lemon-flavour. The stored seed also needs hot water treatment prior to sowing[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on until large enough to plant out.
Cuttings of half-ripe wood, 10cm with a heel[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
Root cuttings 4cm long, potted up vertically. Good percentage[
78
Title
Propagation of Trees, Shrubs and Conifers.
Publication
 
Author
Sheat. W. G.
Publisher
MacMillan and Co
Year
1948
ISBN
-
Description
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
,
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
Suckers[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2019-07-22. <tropical.theferns.info/viewtropical.php?id=Rhus+virens>

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