It is a shrub with pinnate leaves with small leaflets and pink, four-petalled flowers.

Its youngest branches are covered with small, warty glands and scattered bristly hairs.

[2][3] The flowers are pink to purplish and are arranged mostly in the upper leaf axils in groups of up to five on a stalk 3–10 mm (0.1–0.4 in) long.

[2][3] Boronia microphylla was first formally described in 1825 by Franz Sieber and the description was published in Ludwig Reichenbach's Iconographia Botanica Exotica.

[2][7][8] Boronias are not usually easy to grow in the garden, but this species is one of the hardiest as long as it is grown in a protected position and given adequate water.