Eucalyptus platypus, also known as moort or maalok,[3] is a species of mallee or marlock that is endemic to the southwest of Western Australia.

Young plants and coppice regrowth have egg-shaped to more or less round leaves 40–65 mm (1.6–2.6 in) long and wide.

[4][5][6][7] Eucalyptus platypus was first formally described in 1851 by William Jackson Hooker in his book Icones Plantarum from material collected near King George's Sound by James Drummond.

It is found on plains and hilly, rocky country in the Great Southern and Goldfields-Esperance regions of Western Australia where it grows in sandy, loam or clay soils often around laterite.

[5] The species is considered as a weed on the Eyre Peninsula where it is known to invade disturbed areas of native vegetation.