Persoonia pentasticha is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia.

Persoonia pentasticha is an erect, spreading shrub that typically grows to a height of 0.4–1.8 m (1 ft 4 in – 5 ft 11 in) with smooth bark and young branchlets that are covered with whitish, greyish or light brown hair when young.

[2][3][4][5] Persoonia pentasticha was first formally described in 1994 by Peter Weston in the journal Telopea from specimens collected by John Stanley Beard north of Wubin in 1963.

[4][6] This geebung grows in sandy soil in heath the area between Mullewa, Mingenew, Wubin and Paynes Find in the south-west of Western Australia.

[5] Persoonia pentasticha is classified as "Priority Three" by the Government of Western Australia Department of Parks and Wildlife[5] meaning that it is poorly known and known from only a few locations but is not under imminent threat.