Eucalyptus blaxlandii is a tree that grows to a height of and forms a
lignotuber. It has persistent, rough, dark brown to greyish stringy bark on the trunk and larger branches and smooth, whitish bark on the thinner ones. Young plants and
coppice regrowth have glossy lance-shaped to egg-shaped leaves long, wide that are a different green on the opposite sides of the leaves and have a
petiole. Adult leaves are lance-shaped, long and wide on a petiole long and the same slightly glossy green on both sides. The flowers are usually borne in groups of nine or eleven in leaf
axils on an unbranched
peduncle long, the individual buds on a
pedicel up to long. Mature buds are oblong or oval, about long and wide with a rounded
operculum. Flowering has been observed in March and November and the flowers are white. The fruit is a woody,
sessile, hemispherical
capsule long and wide with the valves level with the rim or slightly above. ==Taxonomy and naming==