Eucalyptus regnans
It is an evergreen tree, the tallest eucalyptus tree, growing 70–120 m (230–400 feet) tall. It has a straight, grey trunk with smooth bark. The leaves are narrow, curved, and end in a point, like a sickle. They grow up to  long and  wide. They are green to grey-green with a red stalk. The flowers are in groups of 9-15 together, each flower about 1 cm (0.5 in) diameter with a ring of many white stamens. The fruit is a hard nut, up to 9 mm (0.5 in) long and 7 mm (0.4 in) wide.