It is an erect or spreading shrub with hairy young stems, egg-shaped leaves and pale pink, mauve or white flowers.

The sepals are pale pink, mauve or white with narrowly egg-shaped lobes 5.1–5.5 mm (0.20–0.22 in) long and there are no petals.

[4][5] In 2017, Kelly Anne Shepherd and Carolyn F. Wilkins designated the specimens collected by James Drummond in the Swan River Colony as the lectotype.

[6] This lasiopetalum grows in forest, usually in river valleys and near creeks from near the Canning Dam to West Cape Howe National Park in the Avon Wheatbelt, Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions of south-western Western Australia.

[2][3] Lasiopetalum floribundum is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.