Comesperma virgatum

Comesperma virgatum, commonly known as milkwort, is a herb in the family Polygalaceae. It is an erect slender herb growing to between 30 cm and 1.6 m high, on sandy and lateritic soils, and sometimes in swampy conditions. Its pink to purple flowers may be seen from September to December or January to March. 
The species was first formally described by French botanist Jacques Labillardière in "Novae Hollandiae Plantarum Specimen" in 1806, from a specimen collected in Van Leuwin's Land.
The species occurs in Western Australia.