Leionema montanum, is a small shrub with terminal clusters of white-pink flowers in upper leaf axils in spring.

Leionema montanum is a small, compact shrub with terete branchlets that grow horizontally along the ground.

The pedicel 1.5–3 mm (0.059–0.118 in) long, smooth or with occasional star-shaped soft hairs, fleshy, and enlarged below the sepals.

The 2 or 3 bracteoles are near the triangular-shaped calyx lobes, are about 0.7 mm (0.028 in) long, fleshy, smooth and similar in appearance to sepals.

[4] The specific epithet (montanum) is derived from the Latin montanus meaning pertaining to a mountain.