Eucalyptus cladocalyx, commonly known as sugar gum, is a species of eucalypt tree found in the Australian state of South Australia.

[4] The strongly discolorous, glossy adult leaves are arranged alternately supported on a petiole that is 0.9 to 2.7 cm (0.35 to 1.06 in) in length.

The buds are often longitudinally striated and scarred, with a rounded operculum, inflexed stamens and cuboid to oblong anthers.

The light grey to brown seeds within the fruit have a flattened-ovoid shape that can be pointed at one end and are 1.5 to 3 mm (0.059 to 0.118 in) long.

[6][7] In 1860, von Mueller referred to Eucalyptus corynocalyx in Fragmenta phytographiae Australiae,[8] citing several earlier publications, including the Linnaea journal article, but all only have a description of E. cladocalyx.

There are three distinct populations: in the southern and central-eastern parts of the Eyre Peninsula, through much of the Flinders Ranges, and on Kangaroo Island.

It is also naturalised overseas in northern and southern Africa, California, Hawaii,[16] Arizona, Israel, Chile, Greece, Portugal and Spain.

The wood is termite resistant, with moderate strength and durability, and can be used for furniture, flooring, posts, construction timber and railway sleepers.

[17] The hard and heavy heartwood is a pale yellow-brown colour and has fine uniform texture with an interlocked grain.

It has the capacity to spread up to 70 metres away from locations where it has been planted, and seems to survive bush fires more effectively than several endemic eucalypt species.