Eucalyptus ornans is a mallee that typically grows to a height of and has smooth whitish to light grey bark that is shed in strips and ribbons. Young plants and
coppice regrowth have
sessile leaves arranged in opposite pairs, narrow lance-shaped, bluish green on the upper surface and whitish below, long and wide. The
crown of the plant often contains intermediate leaves as well as adult leaves. Adult leaves are arranged alternately, the same slightly glossy green on both sides, narrow lance-shaped, long and wide on a
petiole long. The flower buds are arranged in leaf
axils in groups of between seventeen and twenty one on an unbranched
peduncle long, the individual buds on thin
pedicels long. Mature buds are spindle-shaped, about long and wide with a conical
operculum about long and wide. Flowering occurs in summer and the flowers are white. The fruit is a sessile, woody, shortened hemispherical
capsule about long and wide with the valves below the rim of the fruit. ==Taxonomy and naming==