Leionema viridiflorum commonly known as green phebalium,[2] is a species of flowering plant in the family Rutaceae.

It is a small shrub with pale yellow-greenish flowers in clusters at the end of branches from winter to early spring.

Leionema viridiflorum is usually a small shrub to 1 m (3 ft 3 in) high with more or less needle-shaped stems covered in star-shaped, short, matted hairs.

The leaves are mostly erect, narrowly oblong to oblong-elliptic, 20–40 mm (0.79–1.57 in) long, 4–8 mm (0.16–0.31 in) wide, wedge shaped at the base, apex lobed, smooth margins, rolled under or upward when dry, upper surface dotted with glands with occasional smooth to star-shaped hairs, underside more or less covered in star-shaped hairs.

[2][3] This species was first formally described by Paul Wilson in 1970 and gave it the name Phebalium viridiflorum and the description was published in the journal Nuytsia.