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Rhus integrifolia

Common name:	Lemonade Berry	Family:	Anacardiaceae
Author:	(Nutt.)W.H.Brewer.&S.Watson.	Botanical references:	11, 71, 200
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:	South-western N. America - California.
Habitat:	Ocean bluffs, canyons and dry places below 800 metres[71], in sandy sterile soil[82]. Often forming close, impenetrable thickets[82].
Edibility Rating (1-5):	2	Medicinal Rating (1-5):	0

Other Common Names:	From various places around the Web, may not be correct. See below.
	Lemonade Berry [E], Lemonade Sumac [DEN2,B,P], Lemonberry [H],
Epithets:	From a Dictionary of Botanical Epithets
	integrifolia = leaves entire;
Systematics:	From a USDA Plants Database
	Order: Sapindales. Sumac family
Other Range Info:	From the Ethnobotany Database
	Us(Ca)

Physical Characteristics

An evergreen shrub growing to 2m. It is hardy to zone 9 and is frost tender. It is in leaf all year, in flower in May. 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 0/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils, requires well-drained soil and can grow in nutritionally poor soil. The plant prefers acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It requires dry or moist soil. The plant can tolerates strong winds but not maritime exposure.

Habitats and Possible Locations

Woodland, Sunny Edge.

Edible Uses

Coffee; Drink; Fruit.

Fruit - raw or cooked[2, 62, 82, 161]. The fruit is covered with a pleasant acid-tasting exudation that can be sucked[84, 92]. The fruit is small, up to 10mm in diameter[229], 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)[84, 94, 95]. The mixture should not be boiled since this will release tannic acids and make the drink astringent[183].
The leaves have been chewed to assuage thirst[257].
The roasted fruit is a coffee substitute.

Medicinal Uses

Disclaimer

None known

Other Uses

Dye; Fuel; Mordant; Oil; Tannin; Wood.

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]. It attains a tallow-like consistency on standing and is used to make candles. These burn brilliantly, though they emit a pungent smoke[4].
Wood - hard, heavy[82]. It is valued and largely used as a fuel[82].

Cultivation details

Succeeds in a well-drained fertile soil in full sun[11, 200]. Succeeds in a hot dry position.
This species is not very hardy in Britain, it may not succeed outdoors even in the mildest areas of the country[200]. One report says they can tolerate temperatures down to about -5°c[260]. Older plants become somewhat hardier and so it is worthwhile growing them on for a few years in pots with some winter protection (such as a cold greenhouse)[K]. Some 4 year old plants were cut back to the base by temperatures below -5°c on our Cornish trial grounds, but they resprouted from the base in early summer[K]. The young growth in spring can be damaged by late frosts.
Plants usually form thickets in the wild[229].
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]. Prick out the seedlings into individual pots when they are large enough to handle. It might be wise to grow the plants on in pots for a few years before planting out - see notes in 'Cultivation Details'[K].
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.

PFAF Web Pages

This plant is mentioned in the following web pages

Web References

Details of Medicinal Uses, Habitats, etc. in M. Grieve A Modern Herbal (1931) [4]
[H] Details of Scandanavian and European Common names in Henriette's names database
[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.
[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[C] Taxon data. from the CalFlora database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database
[DEN] Data _ Photos (Good Identification info) from the Virginia Tech's Dendrology Deptarments' Tree Fact Sheets.

References for the family Anacardiaceae.

To be included in 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.

[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]).

[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.

[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.

[62] Elias. T. and Dykeman. P. A Field Guide to N. American Edible Wild Plants. Van Nostrand Reinhold 1982 ISBN 0442222009
Very readable.

[71] Munz. A California Flora. University of California Press 1959
An excellent flora but no pictures. Not for the casual reader.

[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.

[82] Sargent. C. S. Manual of the Trees of N. America. Dover Publications Inc. New York. 1965 ISBN 0-486-20278-X
Two volumes, a comprehensive listing of N. American trees though a bit out of date now. Good details on habitats, some details on plant uses. Not really for the casual reader.

[84] Coyle. J. and Roberts. N. C. A Field Guide to the Common and Interesting Plants of Baja California. Natural History Publishing Co. 1975
A very readable pocket flora with good illustrations, it gives quite a few plant uses.

[92] Balls. E. K. Early Uses of Californian Plants. University of California Press 1975 ISBN 0-520-00072-2
A nice readable book.

[94] Sweet. M. Common Edible and Useful Plants of the West. Naturegraph Co. 1962 ISBN 0-911010-54-8
Useful wild plants in Western N. America. A pocket guide.

[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.

[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.

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

[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.

[229] Elias. T. The Complete Trees of N. America. Field Guide and Natural History. Van Nostrand Reinhold Co. 1980 ISBN 0442238622
A very good concise guide. Gives habitats, good descriptions, maps showing distribution and a few of the uses. It also includes the many shrubs that occasionally reach tree proportions.

[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.

[260] Phillips. R. & Rix. M. Conservatory and Indoor Plants Volumes 1 & 2 Pan Books, London. 1998 ISBN 0-330-37376-5
Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.

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