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Eucalyptus globulus
The Tasmanian blue gum, southern blue gum or blue gum (''Eucalyptus globulus'') is an evergreen tree, one of the most widely cultivated trees native to Australia. They typically grow from tall. The tallest currently known specimen in Tasmania is tall.〔(Giant Trees Consultative Committee )〕 There are historical claims of even taller trees, the tallest being .〔(Lewin, D. W. 1906: The Eucalypti Hardwood Timbers of Tasmania )〕 The natural distribution of the species includes Tasmania and southern Victoria (particularly the Otway Ranges and southern Gippsland). There are also isolated occurrences on King Island and Flinders Island in Bass Strait and on the summit of the You Yangs near Geelong. There are naturalised non-native occurrences in Spain and Portugal, Akamas, and other parts of southern Europe, southern Africa, New Zealand, western United States (California), Hawaii and Macaronesia, Caucasus (Western Georgia).〔(【引用サイトリンク】 GRIN Taxonomy for Plants - ''Eucalyptus globulus'' )〕〔:ka:ევკალიპტი ევკალიპტი〕
The d'Entrecasteaux expedition made immediate use of the species when they discovered it, the timber was used to improve their oared boats. The Tasmanian Blue Gum was proclaimed as the floral emblem of Tasmania on 27 November 1962. The species name is from the Latin ''globulus'', a little button, referring to the shape of the operculum.
==Description==
The bark sheds often, peeling in large strips. The broad juvenile leaves are borne in opposite pairs on square stems. They are about 6 to 15 cm long and covered with a blue-grey, waxy bloom, which is the origin of the common name "blue gum". The mature leaves are narrow, sickle-shaped and dark shining green. They are arranged alternately on rounded stems and range from in length. The buds are top-shaped, ribbed and warty and have a flattened operculum (cap on the flower bud) bearing a central knob. The cream-coloured flowers are borne singly in the leaf axils and produce copious nectar that yields a strongly flavoured honey. The fruits are woody and range from in diameter. Numerous small seeds are shed through valves (numbering between 3 and 6 per fruit) which open on the top of the fruit. It produces roots throughout the soil profile, rooting several feet deep in some soils.
The plant was first described by the French botanist Jacques Labillardière in his publications ''Relation du Voyage à la Recherche de la Pérouse'' (1800) and ''Novae Hollandiae Plantarum Specimen'' (1804).〔IPNI citation: ''Eucalyptus globulus'' Labill. Voy. i. 153. t. 13; Nov. Holl. Pl. ii. 121.〕 The author collected specimens at Recherche Bay during the d'Entrecasteaux expedition in 1792.〔
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