Eucalyptus dendromorpha is a tree that typically grows to a height of but sometimes to , and forms a
lignotuber. It has rough, compacted scaly, flaky or short-fibrous bark on the base of the trunk, smooth grey or white bark above, the smooth bark often with insect scribbles. Young plants and
coppice regrowth have elliptic leaves that are glossy green but paler on the lower surface, long and wide. Adult leaves are the same glossy green on both sides, lance-shaped to curved, long and wide on a
petiole long. The flower buds are arranged in leaf
axils in groups of seven, nine or eleven, on an unbranched
peduncle long, the individual buds on a
pedicel long. Mature flower buds are oval to club-shaped, long and wide with a conical to rounded
operculum with a small point on the tip. Flowering mainly occurs in December and January and the flowers are white. The fruit is a woody cup-shaped or barrel-shaped
capsule long and wide on a pedicel long and with the valves enclosed below the rim of the fruit. ==Taxonomy and naming==