Eucalyptus olsenii: is a member of the Myrtaceae family and is known as the Woila Gum.
Eucalyptus olsenii grows into a tree reaching 12 metres. The bark is rough on the lower part of the trunk whilst the rest of the trunk and branches are smooth, white, cream or grey.
Leaves may be lance-like or curved, up to 12 centimetres long, two centimetres wide and glossy green.
Buds are carried in clusters of seven and have distinctive ribs or ridges (see image). Large white flowers are carried in spring and summer. The specimen illustrated flowered at Yallaroo in late summer. Gum nuts that follow the flowers are barrel or urn-shaped and two centimetres long.
Our plant flowered for the first time about four years after planting. In our garden Eucalyptus olsenii has proved tolerant of drought and frost, fast growing and free flowering.
Eucalyptus olsenii is classified as a rare species because it has a restricted range. All known populations are protected in two national parks, Deua and Wadbilliga on the Southern Tablelands of New South Wales.
Our plant was obtained from the Yarralumla Nursery in Canberra. We are pleased to see that Eucalyptus olsenii is available for cultivation. The species has a greater chance of long term survival if plants are grown in “captivity”.
The common name refers to Mother Woila Mountain and Woila Creek, both locations in Deua National Park.
Propagate from seed.