Mirbelia trichocalyx is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia.

It is a dense, erect, spiny shrub that typically grows to a height of 15–75 cm (5.9–29.5 in) and has orange or yellow and red flowers from July to October.

[2] The species was first formally described in 1923 by Karel Domin in the Vestnik Kralovske Ceske Spolecnosti Nauk, Trida Matematiko-Prirodevedecke from specimens he collected by Arthur Dorrien-Smith.

[3][4] The specific epithet (trichocalyx) means "hair-like calyx".

[5] Mirbelia taxifolia is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.