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Eucalyptus viminalis

Common name:	Manna Gum	Family:	Myrtaceae
Author:	Labill.	Botanical references:	11, 200
Synonyms:	Eucalyptus angustifolia ((Turcz.)Desf. ex Link.)
Known Hazards:	Citronellal, an essential oil found in most Eucalyptus species is reported to be mutagenic when used in isolation[269]. In large doses, oil of eucalyptus, like so many essential oils has caused fatalities from intestinal irritation[269]. Death is reported from ingestion of 4 - 24 ml of essential oils, but recoveries are also reported for the same amount[269]. Symptoms include gastroenteric burning and irritation, nausea, vomiting, diarrhoea, oxygen deficiency, ,weakness, dizziness, stupor, difficult respiration, delirium, paralysis, convulsions, and death, usually due to respiratory failure[269].
Range:	Australia - Tasmania.
Habitat:	Cool moist sites, usually on better soils, to 1400 metres[77, 152].
Edibility Rating (1-5):	3	Medicinal Rating (1-5):	2

Other Common Names:	From various places around the Web, may not be correct. See below.
	Manna Gum [H,B,P], Ribbon Gum [H],
Epithets:	From a Dictionary of Botanical Epithets
	viminalis = long slender shoots;
Systematics:	From a USDA Plants Database
	Order: Myrtales. Myrtle family

Physical Characteristics

An evergreen tree growing to 30m by 15m at a fast rate. It is hardy to zone 8. It is in leaf all year, in flower from July to August. The scented flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees. It is noted for attracting wildlife. We rate it 3/5 for edibility and 2/5 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 moist or wet soil and can tolerate drought.

Habitats and Possible Locations

Bog Garden, Woodland, Canopy.

Edible Uses

Manna.

A manna is exuded from the leaves[4, 11, 177] (from the bark as well according to some reports[61, 177]) as a result of insect damage[144]. The red gum or manna exuding from cracks in the bark is eaten eagerly by boys[269]. Eucalyptus manna, which exudes from punctures in summer months, is sometimes consumed[269]. A very pleasant sweet taste[46, 105], it is slightly laxative[152]. The aboriginal Australians collected it after it fell to the ground, or they scraped it from the leaves[183]. Heavily covered leaves were pounded and baked[183]. Since the manna is probably formed as a result of insect damage, it is quite possible that it will not be formed in Britain because the same insects will not be able to live here[K]. The manna contains the sugars arabinose, raffinose, dextrose, and sucrose[269].

Medicinal Uses

Disclaimer

Antiviral; Laxative.

A sweet manna exuded from the plant has a mild laxative effect[152, 238].
The essential oil found in the leaves shows an antiviral effect and can be used in the treatment of influenza[269]. The leaves inhibit the growth of Staphylococcus aureus[269].
The leafy twig decoction was used to bathe rheumatic limbs[269].

Other Uses

Adhesive; Essential; Fuel; Repellent; Soil stabilization; Wood.

The leaves contain between 0.35 - 0.75% essential oil, of which 50 - 65% is cineol, 5% is pinene, and 10% is eudesmol[154, 269].
The bark contains 4.8 - 8% tannin[269].
The red gum or manna exuding from cracks in the bark has been used for making adhesives[269].
Planted in S. Europe for soil stabilization and to drain marshes in order to get rid of malarial mosquitoes[50].
Wood - coarse grained, durable in the soil[46, 61], excellent quality[77]. In rich soils the wood is not so hard or durable[155]. The wood, which weighs about 51 lb./cu ft, is used for building, construction, joinery, and vehicles[269]. It is considered suitable for paper pulp[269] and is a moderately good fuel[155].

Cultivation details

Prefers a sunny position in a moderately fertile well-drained moisture retentive circum-neutral soil[200]. Tolerates poor soils, especially those low in mineral elements[200]. Tolerates dry soils and also drought once it is established[200].
A fairly hardy species, one report suggests that it is hardy to between -15°c and -20°c[200] whilst another says that plants succumb to hard frosts[11].
Eucalyptus species have not adopted a deciduous habit and continue to grow until it is too cold for them to do so. This makes them more susceptible to damage from sudden cold snaps. If temperature fluctuations are more gradual, as in a woodland for example, the plants have the opportunity to stop growing and become dormant, thus making them more cold resistant. A deep mulch around the roots to prevent the soil from freezing also helps the trees to survive cold conditions. The members of this genus are remarkably adaptable however, there can be a dramatic increase in the hardiness of subsequent generations from the seed of survivors growing in temperate zones[200].
Eucalyptus monocultures are an environmental disaster, they are voracious, allelopathic and encourage the worst possible attitudes to land use and conservation[200].
A fast growing tree, it is often cultivated in S.W. Europe for timber, soil stabilization shelter and as an anti-malarial measure, the trees are capable of drying out wet ground, making it unsuitable for mosquitoes to breed in[50].
This species is very easily confused with E. dalrympleana[11].
Plants are shallow-rooting and, especially in windy areas, should be planted out into their permanent positions when small to ensure that they do not suffer from wind-rock[245]. They strongly resent root disturbance and should be container grown before planting out into their permanent position[11].
The flowers are rich in nectar and are a good bee crop[200].

Propagation

Seed - surface sow February/March in a sunny position in a greenhouse[11, 78, 134]. Species that come from high altitudes appreciate 6 - 8 weeks cold stratification at 2°c[200]. Pot up the seedlings into individual pots as soon as the second set of seed leaves has developed, if left longer than this they might not move well. Plant out into their permanent positions in early summer and give them some protection from the cold in their first winter. The seed can also be sown in June, the young trees being planted in their final positions in late spring of the following year. The seed has a long viability[200].

Scent

Leaves:: No details on scent.

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

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
[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.
[HEC] Use, Folk Medicine, etc. from Handbook of Energy Crops by James Duke
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for the family Myrtaceae.

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.

[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.

[46] Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim 1959
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.

[50] ? Flora Europaea Cambridge University Press 1964
An immense work in 6 volumes (including the index). The standard reference flora for europe, it is very terse though and with very little extra information. Not for the casual reader.

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.

[77] Kelly. S. Eucalypts. (2 volumes.) Nelson, Melbourne 1969
A very readable book (in two volumes) on the many species of Eucalyptus trees in Australia.

[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.

[105] Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing 1976
The most comprehensive guide to edible plants I've come across. Only the briefest entry for each species, though, and some of the entries are more than a little dubious. Not for the casual reader.

[134] Rice. G. (Editor) Growing from Seed. Volume 2. Thompson and Morgan. 1988
Very readable magazine with lots of information on propagation. An interesting article on Ensete ventricosum.

[144] Cribb. A. B. and J. W. Wild Food in Australia. Fontana 1976 ISBN 0-00-634436-4
A very good pocket guide.

[152] Lassak. E. V. and McCarthy. T. Australian Medicinal Plants.
A very good and readable guide to the subject.

[154] Ewart. A. J. Flora of Victoria.
A flora of eastern Australia, it is rather short on information that is useful to the plant project.

[155] Arnberger. L. P. Flowers of the Southwest Mountains. Southwestern Monuments Ass. 1968
A lovely little pocket guide to wild plants in the southern Rockies of America.

[177] Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books 1984 ISBN 3874292169
An excellent book for the dedicated. A comprehensive listing of latin names with a brief list of edible parts.

[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.

[238] Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995 ISBN 0-7513-020-31
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.

[245] Genders. R. Scented Flora of the World. Robert Hale. London. 1994 ISBN 0-7090-5440-8
An excellent, comprehensive book on scented plants giving a few other plant uses and brief cultivation details. There are no illustrations.

[269] Duke. J. Handbook of Energy Crops - 1983
Published only on the Internet, excellent information on a wide range of plants.

Readers Comments

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