Synaphea petiolaris is a shrub endemic to Western Australia.
The tufted shrub typically grows to a height of 0.1to. It blooms between June and January producing yellow flowers.
It is found around swamps and on sand plains, slopes and low-lying areas in the Peel, South West, Great Southern and Goldfields-Esperance regions of Western Australia where it grows in sandy soils over laterite or granite.