Lasiopetalum trichanthera is a species of flowering plant in the family Malvaceae and is endemic to a restricted area in the south-west of Western Australia.

It is an erect to straggling, sticky shrub with many hairy stems, egg-shaped leaves and bright pink and dark red flowers.

The leaves are covered with white and rust-coloured, star-shaped hairs, densely so on the lower surface, but become glabrous with age.

[2][3] Lasiopetalum trichanthera was first formally described in 2015 by Kelly Anne Shepherd and Carolyn F. Wilkins in the journal Nuytsia from specimens collected in Bobakine Nature Reserve in 2005.

[2][3] Lasiopetalum trichanthera is listed as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions,[2] meaning that it is poorly known and from only one or a few locations.