Thomasia purpurea is a small, flowering shrub in the family Malvaceae that is endemic to the southwest of Western Australia.

It has oblong to narrow-oval shaped leaves, 1–3 cm (0.39–1.18 in) long, 7 mm (0.28 in) wide, hairy especially on the underside and wavy margins.

The small flowers are cup-shaped, droopin, borne in clusters of 1–3 at the end of branches, lacking petals and calyx lobes pinkish purple.

[2][3][4][5] The species was first formally described by Swedish botanist Jonas Carlsson Dryander and the description was published in William Aiton's Hortus Kewensis in 1811 as Lasiopetalum purpureum.

[8] This species grows in coastal regions of south-west Western Australia on ridges, flat lands, seasonally wet locations and sandy hills.