It is a mallee with smooth bark, lance-shaped adult leaves, flower buds in groups of seven, white flowers and clustered hemispherical fruit.Eucalyptus conglomerata is a mallee that typically grows to a height of 5–8 m (16–26 ft) or rarely a tree to 20 m (66 ft).

[3][4][5][6][7] Cong mallee was first formally described in 1867 by George Bentham from an unpublished description by Robert Brown who gave it the name Eucalyptus dumosa var.

[9] In 1922, Joseph Maiden raised the variety to species status as Eucalyptus conglobata.

[14][15] The specific epithet (conglobata) possibly refers to the clusters of flower buds and fruit.

[3][16] Subspecies perata is common west of Esperance, including in the Stirling Ranges, Fitzgerald River National Park and Ravensthorpe.

[3][17] Both subspecies of Eucalyptus conglobata are classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.