Thomasia triloba is a species of flowering plant in the family Malvaceae and is endemic to the south-west of Western Australia.

It is an erect, open shrub that typically grows to a height of 0.4–1 m (1 ft 4 in – 3 ft 3 in) and has pink or purple flowers in October and November.

[2] The species was first formally described in 1846 by Nikolai Turczaninow in the Bulletin de la Société Impériale des Naturalistes de Moscou from specimens collected by James Drummond.

[3][4] This species of thomasia is listed as "Priority One" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[2] meaning that it is known from only one or a few locations which are potentially at risk,[5] but may be extinct.

This Malvaceae article is a stub.