Eucalyptus agglomerata, commonly known as blue-leaved stringybark,[3] is a tree endemic to eastern Australia.

It has persistent, stringy bark, green or greyish leaves with a bluish sheen, flower buds in groups of eleven to fifteen, white to cream-coloured flowers and crowded, flattened hemispherical fruit.Eucalyptus agglomerata is a tree that grows to a height of 40 m (100 ft) and has thick, fibrous, stringy bark, usually colored grey over reddish brown.

[4][5][6][7][8] Eucalyptus agglomerata was first formally described in 1922 by Joseph Maiden and the description was published in Journal and Proceedings of the Royal Society of New South Wales.

The type specimen was collected in 1896 by Maiden from Hill Top in the Southern Highlands district of New South Wales.

[9][10][11] The specific epithet (agglomerata) is a Latin adjective meaning "balled" or "gathered into a mass",[12] referring to the crowded fruit.

[14] A field study conducted in the Campbelltown district southwest of Sydney published in 2000 found that koalas preferred Blue-leaved Stringybark and Grey Gum but only when the two tree species were growing on shale-based rather than sandstone soils.