Species of Triplarina occur in New South Wales and Queensland usually growing in woodland or forest.

Plants in the genus Triplarina are shrubs with small leaves arranged in opposite pairs, sometimes with wavy or finely-toothed edges, and oil-dots visible on the lower surface.

The ovary is half-inferior and has three locules, each containing eight to thirteen ovules, and the fruit is a capsule containing kidney-shaped seeds.

[2][3] The genus Triplarina was first formally described in 1838 by Constantine Samuel Rafinesque in his book Sylva Telluriana.

[3][5][6] The names of seven species of Triplarina are accepted at the Australian Plant Census:[7] Shrubs in the genus Triplarina usually grow in woodland or forest, rarely in heath, and are mostly found in small, isolated populations in sheltered positions near the coast, although T. paludosa grows on tablelands 180 km (110 mi) from the coast.