what is a blue gum
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 30â55 m (98â180 ft) tall. The tallest currently known specimen in Tasmania is 90.7 m (298 ft) tall.hey 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 15â35 cm (5.9â13.8 in) in length.