Southern Blue Gum

Eucalyptus globulus, commonly known as Southern Blue Gum or blue gum, is a species of tall, evergreen tree endemic to southeastern Australia. The Eucalyptus globulus tree normally reaches a height of 45 meters, but it can occasionally only be a stunted shrub. In addition, in perfect conditions, it can reach heights of 90 to 100 meters and produce a lignotuber. Usually white to cream in color and smooth, the bark might occasionally have stubborn, unshed slabs at the base. The stems of young plants, which can grow to heights of several meters, and coppice regrowth are more or less square in cross-section with a noticeable wing on each corner. Sessile, glaucous, elliptic to egg-shaped, up to 150 mm long and 105 mm wide, juvenile leaves are typically placed in opposite pairs.

The flower buds are grouped singly, in clusters of three or seven, or on a short, thick peduncle in the axils of the leaves. Additionally, the individual buds are typically sessile and occasionally on pedicels up to 5 mm long. Mature buds have a flattened hemispherical, warty operculum with a central knob and are top-shaped to conical, glaucous, or green. Subspecies and geographic distribution affect the flowering period, but white blooms are always present. The fruit is a woody, hemispherical or conical capsule with valves that are almost at rim level.