It is an erect or spreading shrub with trowel-shaped, triangular, egg-shaped or lance-shaped leaves with a sharply-pointed tip and golden yellow and red to purplish-brown flowers.

Bossiaea cinerea is an erect to spreading shrub that typically grows to a height of up to 1.5 m (4 ft 11 in) tall and has densely hairy stems.

The standard petal is yellow with a red base, a darker colour on the back and up to 9 mm (0.35 in) long.

Flowering occurs from August to November and the fruit is an egg-shaped to oblong pod 19–20 mm (0.75–0.79 in) long.

[2][3][4][9] This bossiaea grows best in well drained soils but tolerates salty winds and dry conditions.