It has smooth bark, lance-shaped adult leaves, flower buds in groups of three or seven, white flowers and cup-shaped, bell-shaped or hemispherical fruit.Eucalyptus dalrympleana is a tree that typically grows to a height of 40 m (130 ft) and forms a lignotuber.

Young plants and coppice regrowth have leaves arranged in opposite pairs and are egg-shaped or heart-shaped to more or less round, 25–70 mm (0.98–2.76 in) long and wide.

[2][3][4][5] Eucalyptus dalrympleana was first formally described in 1920 by Joseph Maiden from a specimen collected by Wilfred de Beuzeville near Yarrangobilly.

[2] In 1962, Lawrie Johnson described two subspecies and the names have been accepted by the Australian Plant Census: Mountain gum grows in woodland and forest at higher elevations in far south-eastern Queensland, New South Wales, Victoria, South Australia and Tasmania.

Subspecies heptantha is only found in far south-eastern Queensland and on the northern tablelands of New South Wales.