Tasmanian ironbark

Eucalyptus sieberi, the silvertop ash or black ash, is a medium-sized to tall evergreen tree of the myrtle family (Myrtaceae) reaching 25–45 m tall, endemic to south-eastern Australia. It does not form a lignotuber. The bark is strongly two-toned: rough, thick, dark grey to black and longitudinally furrowed on the trunk and lower branches, abruptly giving way to smooth, white to creamy-yellow bark on the upper trunk and limbs that sheds in long ribbons. Juvenile leaves are bluish-green and broadly ovate, while adult leaves are glossy green, lanceolate to falcate, and 85–195 mm long. Creamy-white flowers in seven- to fifteen-flowered umbels appear from September to January and are followed by woody, barrel-shaped to conical capsules 6–11 mm long. The species occurs from south-eastern Queensland through eastern New South Wales and Victoria to north-eastern Tasmania, typically forming pure stands on shallow, infertile soils in dry sclerophyll forest.