Swainsona purpurea

About

Swainsona purpurea, commonly known as purple Swainson-pea or purple Darling pea, is a species of flowering plant in the family Fabaceae and is endemic to arid areas of inland Australia. It is an erect or spreading annual or perennial plant with imparipinnate leaves with 3 to 11 mostly linear or elliptic leaflets, and racemes of 3 to about 20 purple flowers.

Summary from Wikipedia