Tasmanian bluegum
Eucalyptus globulus Labill.

Overview

Appearance

Eucalyptus globulus is an aromatic tree. Commonly attains a height of 150-180 ft. (45.7-54.9 m) and a diameter of 4-7 ft. (1.2-2.1 m). It has a straight trunk up to two-thirds of its total height and a well-developed crown.

Foliage

Leaves are glossy, dark green, thick and leathery. They average in length from 5.9-7.9 in. (15-20 cm). The leaves of the young shoots are ovate, opposite, and horizontal. They are covered with a grey, waxy bloom which is much thicker on the bottom surface of the leaf.

Flowers

Solitary white flowers with many stamens, arise from the axils on flattened stalks. They range from 1.6-2.2 in. (4-5.5 cm) wide. Sepals and petals are united to form a warty lid which is present on the bud and drops off at flowering. Flowers from December to May.

Fruit

The fruit is a hard, woody globose capsule. The fruit is 0.8-1 in. (2-2.5 cm) across. The numerous seeds are approximately 0.08 in. x 0.04 in. (2 x 1 mm). Seeds are dark brown with a brownish red chaff.

Ecological Threat

Eucalyptus globulus out-competes native vegetation for space, light and nutrients. It is native to Australia.

Resources

• Element Stewardship Abstract - The Nature Conservancy

Selected Images

Maps

Invasive Listing Sources

• California Invasive Plant Council
• Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
• John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
• Reichard, Sarah. 1994.  Assessing the potential of invasiveness in woody plants introduced in North America. University of Washington Ph.D. dissertation.
• WeedUS - Database of Plants Invading Natural Areas in the United States

References