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| Corymbia citriodora (Hook.) K.D. Hill & L.A. Johnson |
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Eucalyptus citriodora |
Corymbia citriodora is a tall tree, to 50 metres in height, from temperate and tropical eastern Australia. It is also known as lemon-scented gum, spotted gum and lemon eucalyptus.
Corymbia citriodora has smooth, uniform or slightly mottled bark, white to coppery in summer, and a conspicuously narrow-leaved crown which is smells strongly of lemons. Pear-shaped buds are borne in clusters of three, formed in the corner of leaf and stem junctions, whilst fruit (capsules) are urn-shaped. The bark is smooth for the entire height of the tree, often powdery, shedding in thin curling flakes.[1]
It prefers lighter loamy soils and occurs in dry sclerophyll forest and woodlands in hilly country. Corymbia citriodora has a lignotuber. Flowering has been recorded in January, April, May, June, July, August, October and December.
Plants of C. citriodora are naturalized in the Darling Range near Mundaring, Western Australia and by planting to suburban New South Wales and Victoria.
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In the Pos solutions reserve in Moorabbin, Victoria there is an outstanding example of this. Due to its great height and scale, it is accessed by the National Trust of Australia as a tree of significance. [2]
Kings Park in Perth, has a famous, beautiful avenue of this species planted many years ago, but it has spread to become a serious weed there also. [3]
Corymbia citriodora is an important forest tree, in demand for structural timber and for honey production. It also is popular in horticulture both within Australia and overseas. The name Corymbia citriodora comes from the Latin citriodorus, which means lemon-scented.
The essential oil of the lemon-scented gum mainly consists of citronellal (80%),[4] produced mainly in Brazil and China.[5] It is used in insect repellents and perfumery. Some research has shown that it is not very effective as an insect repellent,[6] while other research demonstrates that its effect against mosquitoes is similar to that of repellents containing low concentrations of DEET.[7]
See also
References
- ^ - Corymbia citriodora
- ^ untitled
- ^ Hussey et al., (1997) Western weeds : a guide to the weeds of Western Australia South Perth, W.A.: Plant Protection Society of W.A. : 1997. ISBN 06463244031997
- ^ Boland, D.J. et al, Eucalyptus Leaf Oils - Use, Chemistry, Distillation and Marketing, ISBN 0-909605-69-6.
- ^ Lawless, J., The Ilustrated Encyclopedia of Essential Oils, ISBN 1-85230-661-0
- ^ Assessment of the efficacy of quwenling as a mosquito repellent. Collins, D. A.; Brady, J. N.; Curtis, C. F. Dep. Biol., Imp. Coll. Sci. Technol. Med., London, UK. Phytotherapy Research (1993), 7(1), 17-20. CODEN: PHYREH ISSN: 0951-418X. Journal written in English.
- ^ CDC: West Nile Virus - Updated Insect Repellent
External links
- Pink, A. (2004). Gardening for the Million. Project Gutenberg Literary Archive Foundation.
- Euclid:Corymbia citriodora
- Pacific Island Ecosystems at Risk (PIER): Corymbia citriodora
Wikipedia content modification information:
- This page was last modified on 5 September 2008, at 20:45.
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