Eucalyptus cooperiana, commonly known as the many-flowered mallee, is a species of mallee that is endemic to an area along the south coast of Western Australia. It is described as being "of striking appearance by reason of its smooth, white bark and acutely angled branchlets". It has lance-shaped adult leaves, flower buds in groups of between nine and thirteen or more, creamy yellow flowers and urn-shaped fruit.

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