It is a prostrate, low-growing or erect perennial herb, with imparipinnate leaves with 3 to 11 linear to elliptic leaflets and racemes of 3 to 11 pink or purple flowers.

Swainsona murrayana is a prostrate, low-growing or erect perennial herb that typically grows up to 25 cm (9.8 in) tall and is densely hairy.

[2][3][4][5] Swainsona murrayana was first formally described in 1881 by Heinrich Wawra von Fernsee in Österreichische botanische Zeitschrift from specimens collected near the Murray River.

[6][7] Slender Darling-pea is usually found in seasonally wet areas and near lakes and is found on the western slopes and plains of New South Wales, in Northern and western Victoria and southern Queensland with an outlier in South Australia.

[2] The main threats to the species are grazing by domestic stock and by rabbits, weed invasion, agriculture and roadside maintenance.