It has narrow elliptical leaves, white flowers and small fruit that fall from the plant when mature.

Flowering mainly occurs from August to November and the fruit is a capsule 2–4 mm (0.079–0.157 in) in diameter with the remains of the sepals attached, but the fruit fall from the plant shortly after reaching maturity.

[2] Gaudium lamellatum was first formally described in 1989 by Joy Thompson in the journal Telopea, based on plant material collected from Bedourie Station in 1963.

[2][3] In 2023, Peter Gordon Wilson transferred the species to the genus Gaudium as G. lamellatum in the journal Taxon.

[2] This tea tree grows in woodland, among rocks and near watercourses in inland Queensland, from the White Mountains National Park to near Millmerran.