Eucalyptus jacksonii, commonly known as the blue mallee, is a species of eucalyptus tree native to Australia. It typically grows to a height of 3 to 10 meters and is characterized by its smooth, pale bark and narrow, lance-shaped leaves. The tree produces clusters of white flowers, which attract various pollinators, including bees. This species thrives in well-drained soils and is often found in open woodlands and mallee habitats. Eucalyptus jacksonii is valued for its timber and essential oils, and it plays a significant role in the local ecosystem by providing habitat for wildlife.