Eucalyptus microtheca, commonly known as Coolabah, is an evergreen tree that is native to a variety of habitats including arid inland areas, floodplains, and grassy woodlands in Northern and Central Australia. It is well-adapted to survive in harsh environments, often found near ephemeral watercourses. The tree typically grows to a height of 5–10 m (16–33 ft) and is characterized by its rough, flaky or fibrous bark on the trunk and branches, which is a common trait among Eucalyptus species. Coolabah trees form a lignotuber, which is a woody swelling at the base of the trunk that allows the tree to resprout after fire or other damage.

The Coolabah is notable for its cream-colored flowers that bloom in the spring and winter, providing a source of nectar for pollinators. The flowers are not particularly showy but are significant for the local ecosystem. In cultivation, this tree is valued for its ability to withstand drought and its unique appearance. It is often used in reforestation projects, as windbreaks, and for ornamental purposes in large open spaces. Eucalyptus microtheca requires full sun and can tolerate a range of soil types, from slow to fast drainage. While it is relatively low-maintenance, it is important to be aware of its potential invasiveness outside its native range. It can become a problem in areas with similar climates to its native habitat, so gardeners should consult local regulations before planting.CC BY-SA 4.0