The leaf upper and lower side and edges are smooth, surface leathery, margins rolled under almost obscuring the paler underside.

The flowers are borne singly on a short peduncle about 1.5 mm (0.059 in) long in upper leaf axils and covered in soft star-shaped hairs.

[2][3][4][5] This species was described in 1825 by Allan Cunningham,[6][7] but the name was changed to Leionema lachnaeoides in 1998 by Paul G. Wilson and the description was published in the journal Nuytsia.

[5] Leionema lachnaeoides grows on rocky outcrops, among heath and scrubland west of Katoomba in the Blue Mountain and from Shipley Plateau, Blackheath.

[4][5] This species is classified as "endangered" under the Environment Protection and Biodiversity Conservation Act 1999 due to factors including weed invasion, altered drainage and fire regimes.