Eucalyptus polyanthemos is a tree that typically grows to a height of  but does not form a lignotuber. It has fibrous or flaky bark on the trunk and larger branches, smooth mottled greyish, cream-coloured and yellow bark above, or sometimes smooth bark throughout.
Eucalyptus polyanthemos is typically a tree that grows to a considerable height but lacks the development of a woody base. Its trunk and larger branches have fibrous or flaky bark, while its upper sections display smooth, mottled greyish, cream-coloured, and yellow bark.