Eucalyptus aggregata, commonly known as black gum, is a medium-sized tree that is endemic to southeastern Australia. It has rough, flaky bark, sometimes smooth on the branches, lance-shaped leaves, green to yellow flower buds in group of seven, white flowers and more or less cup-shaped fruit. It is a component of grassy woodland, often in low-lying or swampy areas, much of which has been cleared and it is under threat.