Gaudium polyanthum is a rigid, spreading shrub or small tree that is endemic to New South Wales.

It has thin, rough bark, young stems that are hairy at first, elliptical leaves, relatively small white flowers and fruit are shed when the seeds are mature.

Gaudium polyanthum is a spreading shrub or small tree, often with pendulous branches, that typically grows to a height of up to 5 m (16 ft).

The flowers are borne singly, sometimes in pairs, on short side shoots from adjacent leaf axils and are white, 5–6 mm (0.20–0.24 in) wide.

[2][3] Gaudium polyanthum was first formally described in 1989 by Joy Thompson in the journal Telopea, based on plant material collected by Ernest Constable near the Nepean Dam near Bargo in 1953.