Eucalyptus moluccana is a tree that typically grows to a height of and forms a
lignotuber. It has persistent rough, fibrous or flaky bark on part or all of the trunk, smooth whitish or light grey bark above, sometimes with a shiny surface. Young plants and
coppice regrowth have egg-shaped leaves that are paler on the lower surface, long, wide and
petiolate. Adult leaves are lance-shaped to broadly lance-shaped, the same glossy green on both sides, long and wide on a petiole long and with many oil glands. The flower buds are arranged on the ends of branchlets in groups of usually seven, on a branched
peduncle wide, the individual buds on
pedicels long. The buds are spindle-shaped to diamond-shaped, long and wide with a conical
operculum. Flowering has been recorded in most months and the flowers are white. The fruit is a woody cup-shaped to barrel-shaped
capsule long and wide with the valves enclosed. ==Taxonomy and naming==