Eucalyptus longifolia, commonly known as woollybutt,[2] is a species of medium-sized tree that is endemic to eastern Australia.

It has rough, fibrous to flaky bark on the trunk and branches thicker than about 80 mm (3.1 in).

[2][3][4][5][6] Eucalyptus longifolia was first formally described in 1822 by Johann Heinrich Friedrich Link in his book, Enumeratio Plantarum Horti Regii Berolinensis Altera.

[7][8] The specific epithet (longifolia) is derived from the Latin words longus "long" and folium "leaf".

[6] In open sclerophyll forest, it grows alongside such trees as white mahogany (E. acmenoides), grey box (E. moluccana), forest red gum (E. tereticornis), and rough-barked apple (Angophora floribunda), while in swampy areas it is found with swamp mahogany (E. robusta) and paperbark species such as snow-in-summer (Melaleuca linariifolia), prickly paperbark (M. styphelioides) and swamp paperbark (M.