Eucalyptus aspersa is usually a
mallee typically growing to a height of but on
Mount Saddleback is a tree to high. It forms a
lignotuber at the base of the trunk and has rough fibrous or flaky, light grey to yellowish bark that is loosely held or partly detached on part of the stems. Leaves on young plants and on
coppice regrowth are elliptic to egg-shaped, bluish green, long and wide. The adult leaves are lance-shaped, slightly glossy, light green, long, wide on a
petiole long. The flowers are arranged in unbranched groups of seven or more on a
peduncle long, the individual flowers on a
pedicel long. The mature buds have are narrow oval, long and wide. The
operculum is beaked, and long. The flowers are white and the fruit are woody, more or less spherical to cup-shaped, After flowering it will produce globose to cup-shaped fruit long and wide. The seeds are brown or grey oval and . ==Taxonomy and naming==