Eucalyptus astringens, commonly known as brown mallet[3] or to Noongar people as mallat, woonert or wurnert,[4] is a tree that is endemic to the South West region of Western Australia.

astringens and published the description in the Journal of the Natural History and Science Society of Western Australia.

[7][8] In 1924, Maiden raised the variety to species status in his book A Critical Revision of the Genus Eucalyptus.

[11] In 2002, Ian Brooker and Stephen Hopper described two subspecies:[12] Brown mallet is commonly found on rocky outcrops, ridges, breakaways, hills and on valley floors in the southern Wheatbelt, Great Southern and south west Goldfields-Esperance regions of Western Australia.

It grows in red-brown gravelly clay, brown clayey sand, sandy loam, spongolite, laterite and sandstone based soils.

Understorey species often include occasional Santalum acuminatum and Melaleuca scalena, and a sparse ground cover of common grasses and herbs such as Thysanotus patersonii, Trachymene pilosa, Pterostylis sanguineus, Austrostipa elegantissima, Austrodanthonia setacea group and Lomandra micrantha subsp.