Corymbia dallachiana is a tree that typically grows to a height of , sometimes more, and forms a
lignotuber. It has smooth white to cream-coloured and pinkish bark that is shed in thin patches. Sometimes there is a short stocking of rough grey bark at the base of the trunk. Young plants and
coppice regrowth have leathery elliptical, later egg-shaped to lance-shaped leaves that are long, wide and
petiolate. Adult leaves are the same shade of green on both sides, lance-shaped or curved, long and wide, tapering to a petiole long. The flower buds are arranged in leaf
axils on a branched
peduncle up to long, each branch of the peduncle usually with three buds on
pedicels long. Mature buds are pear-shaped, long and wide with a rounded
operculum. Flowering has been observed in November and December and the flowers are white. The fruit is a woody cup-shaped, cylindrical or barrel-shaped
capsule long and wide with the valves enclosed in the fruit or at rim level. ==Taxonomy and naming==