The Blue mallee, Blue-leaved mallee or blue-leaved oil mallee, Eucalyptus polybractea (also formerly E. fruticetorum) is a small multi-trunked sclerophylltree that grows naturally in western New South Wales around West Wyalong and in Central Victoria Whipstick Scrub north of Bendigo and similar patches of mallee at Inglewood, Wedderburn, Wychitella, St. Arnaud, Rushworth areas in Victoria, Australia. The bark is smooth, and fibrous near the trunk base. Leaves are disjunct and linear to narrow-lanceolate. Juvenile leaves are glaucous, and adult leaves grey-green. Flowers are followed by woody capsules 3–6 mm long.