Philotheca sericea 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 oval to elliptical leaves and white to pink flowers usually arranged singly at the end of branchlets.

Philotheca sericea is a shrub that typically grows to a height of 1.5 m (4 ft 11 in) with moderately hairy branchlets.

[2][3][4] This philotheca was first formally described in 1970 by Paul Wilson who gave it the name Eriostemon sericeus and published the description in the journal Nuytsia from specimens collected by Nathaniel Speck near Kalli in 1964.

[7][8] Philotheca sericea grows in shrubland, often near granite or laterite, from near Geraldton to near Sandstone in the south-west of Western Australia.