Eucalyptus gunnii, the cider gum or gunnii, is a species of flowering plant in the family Myrtaceae, endemic to Tasmania, occurring on the plains and slopes of the central plateaux to around 1100 metres, with isolated occurrences south of Hobart.
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Description
It is a small to medium-sized evergreen tree. Older specimens have a short, massive bole and large, spreading branches. The bark is often persistent for several metres as a thin, grey stocking, or shedding all over to leave a smooth, yellowish, patchy surface, weathering to white-, green- or pink-grey.
Leaves are stalked, elliptical to ovate, to 8 cm long and 3 cm broad, concolorous, grey-green and thick. The foliage will change as the tree matures from a round leaf of waxy blue colour to a more elongated rich green foliage in the older tree but if maintained as a shrub the juvenile foliage will be retained.
White flowers are produced in midsummer.
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Cultivation and uses
See also Tasmanian Aborigines - Oyster Bay Tribe
This species is noted for exceptional cold tolerance for a eucalyptus (to -14 °C, exceptionally -20 °C for brief periods) and is now commonly planted as an ornamental tree across the British Isles and some parts of western Europe. Fast-growing, it will produce a tree up to 37 m (121 ft) tall when mature, with growth rates of up to 1.5 m (4 ft 11 in) (rarely 2 m (6 ft 7 in)) per year. Pruning can be employed to maintain the tree as a small shrub if required and more shaded spots will restrict growth. It does grow on sandy/chalky soils, but prefers a loamy soil; it does not tolerate very wet sites.
This plant has gained the Royal Horticultural Society's Award of Garden Merit.
The plant produces a sweet sap similar to maple syrup, and is being considered for cultivation for this product. When bottled and capped, the liquid ferments and resembles apple cider, hence cider gum. The sweet foliage is eagerly eaten by livestock.
The 1889 book 'The Useful Native Plants of Australia' records that common names in Tasmania are "Cider Gum" and in South-Eastern Australia occasionally as the "Sugar Gum" and that in the same part it is known as "White Gum" "Swamp Gum" or "White Swamp Gum" and in the Noarlunga and Rapid Bay districts of South Australia as "Bastard White Gum". Occasionally it is known as " Yellow Gum." near Bombala (New South Wales) two varieties go by the names of "Flooded or Bastard Gum" and "Red Gum". "In the same part it is known as "White Gum," "Swamp Gum," or " White Swamp Gum," and in the Noarlunga and Rapid Bay districts of South Australia as " Bastard White Gum." Occasionally it is known as " Yellow Gum." Near Bombala (New South Wales) two varieties go by the names of " Flooded or Bastard Gum,"and "Red Gum."
Source of the article : Wikipedia
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