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

Flowering occurs from July to November and the fruit is a papery capsule 7 mm (0.28 in) in diameter.

[4][5] In 1917, George Claridge Druce transferred the species to Guichenotia as G. angustifolia in the supplement to The Botanical Exchange Club and Society of the British Isles Report for 1916.

[2][7] Guichenotia angustifolia usually grows in shrubland from near Perth to near Brookton and Northampton in the Avon Wheatbelt, Geraldton Sandplains and Jarrah Forest bioregions of south-western Western Australia.

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