Eucalyptus polybractea, commonly known as the blue mallee, is a species of eucalyptus tree native to Australia. It typically grows in arid and semi-arid regions, characterized by its tall, slender trunk and aromatic leaves. The tree can reach heights of up to 10 meters and is known for its distinctive blue-green foliage. This species is valued for its essential oil, which is extracted from the leaves and has various applications, including in aromatherapy and as a natural antiseptic. Eucalyptus polybractea is also important for local wildlife, providing habitat and food for various species, including koalas.