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Eucalyptus citriodora - Hook.
                 
Common Name Lemon-Scented Gum, Lemon Scented Eucalyptus
Family Myrtaceae
USDA hardiness 9-11
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].
Habitats Usually found in heavy soils[77], but also succeeding on deep sandy loams in coastal regions[153].
Range Australia - Queensland.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Tender Well drained soil Moist Soil Wet Soil Full sun

Summary
Bloom Color: White. Main Bloom Time: Early winter, Late winter, Mid winter. Form: Oval, Upright or erect.

Eucalyptus citriodora Lemon-Scented Gum, Lemon Scented  Eucalyptus


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Eucalyptus citriodora Lemon-Scented Gum, Lemon Scented  Eucalyptus
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Physical Characteristics
 icon of manicon of cone
Eucalyptus citriodora is an evergreen Tree growing to 45 m (147ft 8in) at a fast rate.
It is hardy to zone (UK) 10. It is in leaf 12-Jan It is in flower from Jul to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees.Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It prefers dry moist or wet soil and can tolerate drought.

Synonyms
E. maculata citriodora.

Habitats
Woodland Garden Sunny Edge; Dappled Shade; Bog Garden;
Edible Uses
Edible Parts: Manna.
Edible Uses:

Produces a sweet manna-like substance that is scraped off the leaves and eaten[183].
Medicinal Uses


Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Antibacterial;  Astringent.

Eucalyptus leaves are a traditional Aboriginal herbal remedy. The essential oil found in the leaves is a powerful antiseptic and is used all over the world for relieving coughs and colds, sore throats and other infections[254]. The essential oil is a common ingredient in many over-the-counter cold remedies[254].An essential oil obtained from the leaves is antibacterial[152]. The essential oil obtained from various species of eucalyptus is a very powerful antiseptic, especially when it is old, because ozone is formed in it on exposure to air. It has a decided disinfectant action, destroying the lower forms of life[4]. The oil can be used externally, applied to cuts, skin infections etc, it can also be inhaled for treating blocked nasal passages, it can be gargled for sore throat and can also be taken internally for a wide range of complaints[4]. Some caution is advised, however, because like all essential oils, it can have a deleterious effect on the body in larger doses[4]. An oleo- resin is exuded from the tree[238]. It can also be obtained from the tree by making incisions in the trunk[4, 152]. This resin contains tannin and is powerfully astringent, it is used internally in the treatment of diarrhoea and bladder inflammation[4, 152, 238], externally it is applied to cuts etc[4, 152].
Other Uses
Essential;  Pot-pourri;  Repellent;  Tannin;  Wood.

A lemon-scented essential oil is obtained from the leaves[4, 46, 77, 269]. It is used, especially in perfumery but also medicinally[61, 152]. The leaves yield between 0.5 to 2.0% essential oil[240]. This species is a very rich source of citronella, which is much used in the perfumery industry[4, 156]. Some batches of the essential oil contain 98% citronella[4]. Glabrous leaves may contain oil with 65.5% citronellal, 12.2% citronellol, and 3.6% isopulegol; hairy leaves contain more oil with 86.6- 90.1% citronellal, 4.6 - 6.0% citronellol, and 0.7 - 0.8% isopulegol, 1-pinene, b-pinene, and isovaleric aldehyde are also recovered[269]. The leaves and the essential oil are used as an insect repellent[156]. The leaves are also an ingredient of pot-pourri[238]. The bark may contain up to 12% tannin[269]. The wood is good for saw-timber and is used for general construction, poles, railroad ties, and tool handles[61, 269]. Firewood yields run 10 - 21 m3/ha/yr[269]. The hard heavy wood (sp. grav. 0.75 - 1.1) burns steadily and makes a good charcoal with an ash content of 1 - 2%[269].
Cultivation details
Industrial Crop: Biomass;  Management: Coppice;  Management: Standard;  Minor Global Crop;  Other Systems: SRC.

Landscape Uses:Aggressive surface roots possible, Specimen, Street tree. Prefers a sunny position in a moderately fertile well-drained moisture retentive circum-neutral soil[200]. Tolerates poor and dry soils, especially those low in mineral elements[200]. Established plants are drought tolerant[200]. Does not succeed in frost hollows or in windy sites[107]. The plant is said to grow best where the annual rainfall, mostly summer, is 60 to 130cm, with a 5 - 7 month dry season, withstanding high temperatures (29 - 35°C mean monthly maximum) and light frosts. It succeeds in tropical and subtropical arid to semiarid zones, in infertile clays, laterites, poor and gravelly soils and podzols, preferably well drained[269]. A very fast growing species but it is not very hardy in Britain[166]. It might succeed outdoors in the mildest areas of the country. 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[200]. 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]. Cultivated in warm temperate areas for its essential oil, it thrives in a Mediterranean climate[61, 77]. Eucalyptus monocultures are an environmental disaster, they are voracious, allelopathic and encourage the worst possible attitudes to land use and conservation[200]. The trees cast a very light shade[77]. Flower buds are formed in the summer prior to flowering and seed capsules need at least a further year in which to ripen[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]. Special Features:Fragrant foliage, Not North American native, Inconspicuous flowers or blooms.
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].

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Other Names
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Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Corymbia citriodoraLemon-Scented Gum, blue spotted gum, lemon eucalyptus, eucalyptus citriodora.23
Eucalyptus caesiaGungurru20
Eucalyptus camaldulensisRed River Gum, Murray Red Gum, River Red Eucalyptus13
Eucalyptus cocciferaMt. Wellington Peppermint00
Eucalyptus dumosaWater Mallee10
Eucalyptus globulusTasmanian Blue Gum, Eurabbie, Blue Gum, Blue Eucalyptus14
Eucalyptus grandisFlooded Gum, Gum, Rose Eucalyptus02
Eucalyptus gummiferaRed Bloodwood13
Eucalyptus gunniiCider Gum33
Eucalyptus johnstoniiYellow Gum, Johnston's gum00
Eucalyptus largiflorensBlack Box10
Eucalyptus leucoxylonYellow Gum, White ironbark, White Eucalyptus10
Eucalyptus macrorhynchaRed Stringybark13
Eucalyptus melliodoraYellow Box00
Eucalyptus microcorysTallow Wood, Australian tallowwood00
Eucalyptus obliquaMessmate00
Eucalyptus paucifloraCabbage Gum, Snow gum00
Eucalyptus pauciflora niphophilaSnow Gum03
Eucalyptus perrinianaSpinning Gum00
Eucalyptus piperitaSydney Peppermint02
Eucalyptus polybracteaBlue Mallee13
Eucalyptus punctataGrey Gum10
Eucalyptus racemosaSnappy Gum03
Eucalyptus regnansMountain Ash00
Eucalyptus robustaSwamp Mahogany, Eucalyptus Gum03
Eucalyptus sideroxylonRed Ironbark, Eucalyptus, Gum, Pink Ironbark00
Eucalyptus viminalisManna Gum32
Eucalyptus youmanii 10
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Expert comment
 
Author
Hook.
Botanical References
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Links / References
For a list of references used on this page please go here
Readers comment
 
Elizabeth H.
Katrina Snow Sat Jul 30 13:03:57 2005
These trees do not make the best trees to plant in backyards: they are subject to sudden limb drop, which is a characteristic of this tree. My two trees have self seeded this year (first time I know of in over 24 years). The leaves smell delicious when you mow over them, and have a lemony-eucalyptus oil smell.
Elizabeth H.
F. Shelfer Mon Sep 18 2006
Where may I purchase a couple of Eucalyptus citriodora trees? On a recent visit to California I saw examples of the species everywhere but no one could tell me of a nursury which sells them;a web search indicates that the US prohibits the further importation of these trees. I live in northwest Florida, on a large rural vineyard and would like to establish a small grove of these beautiful trees.

Shelfer Vineyards shelfer_f@hotmail.com

Elizabeth H.
dclidgard@gmaill.com Fri Feb 29 2008
I am growing this plant as a house plant in Nova Scotia, Canada because of its delightful aroma. I haven't quite figured out the conditions the plant enjoys and its leaves tend to turn brown. Any advice would be most welcome.
Elizabeth H.
Ram Prakash Rai Fri Nov 14 2008
I want about the eucalyptus citriodora, have any antimicrobial activity orantifungal activity .And how much work has been completed on this plant.
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Subject : Eucalyptus citriodora  

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