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

Thomasia tremandroides is an erect shrub that typically grows to 10–60 cm (3.9–23.6 in) high and 5–100 mm (0.20–3.94 in) wide, its many stems covered with both simple and star-shaped hairs.

[2][3][4] Thomasia tremandroides was first formally described in 1974 by Susan Paust in the journal Nuytsia from specimens she collected north of Wubin in 1972.

[2][5] The specific epithet (tremandroides) means resembling some species of "Tremandraceae",[2] (now included in the family Elaeocarpaceae).

[3][4] Thomasia microphylla is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.