Diplolaena ferruginea is a species of flowering plant in the family Rutaceae and is endemic to Western Australia.

Diplolaena ferruginea is a small, spreading shrub to 0.2–1 m (7.9 in – 3 ft 3.4 in) high with smooth branches covered in scales or star-shaped hairs.

The leaves are simple, leathery, upper surface bright green, arranged opposite, 15–40 mm (0.59–1.57 in) long, 8–20 mm (0.31–0.79 in) wide, flat, smooth, covered in star-shaped hairs or scales.

[2][3] Diplolaena ferruginea was first formally described in 1971 by Paul Graham Wilson and the description was published in Nuytsia.

[5] This species grows in a variety of situations including gravel, sand, clay on or near the Western Australian coast.