Pityrodia ternifolia is a species of flowering plant in the mint family, Lamiaceae and is endemic to north-western Australia.

It is an erect shrub with densely hairy stems, sticky and prickly, egg-shaped leaves, and mauve or pinkish-red, tube-shaped flowers.

[3][4] This species was first formally described in 1859 by Ferdinand von Mueller who gave it the name Dennisonia ternifolia in the Journal of the Proceedings of the Linnean Society, Botany.

[6]` This pityrodia grows in sandy soils on sandstone ridges and rocks in the Northern Kimberley, Victoria Bonaparte, Arnhem Coast, Arnhem Plateau, Darwin Coastal, Gulf Coastal, Gulf Fall and Uplands, Ord Victoria Plain and Pine Creek bioregions of the Northern Territory and Western Australia.

[4] Together with P. jamesii and P. pungens, P. ternifolia is a primary food source for the uncommon and very brightly coloured Leichhardt's grasshopper (Petasida ephippigera).