Philotheca tomentella is a species of flowering plant in the family Rutaceae and is endemic to the south-west of Western Australia.

It is an undershrub with small club-shaped to cylindrical leaves and white flowers with a pale red central stripe, arranged singly or in groups of up to four on the ends of branchlets.

[2][3][4] This species was first described in 1904 by Ludwig Diels and Ernst Georg Pritzel who gave it the name Erisotemon tomentellus in Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie.

[7][8] This philotheca grows in shrubland on sand between the Murchison Ranges, Lake Grace and Queen Victoria Spring area in the south-west of Western Australia.

[3] Philotheca tomentella is classified as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.