Triplarina nitchaga is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to a restricted area of north Queensland.

It is a shrub with lance-shaped leaves with the narrower end towards the base, flowers with five sepals, five white petals and seventeen or eighteen stamens.

Triplarina nitchaga is a shrub that typically grows to a height of up to 2.5 m (8 ft 2 in) and has a grey, scaly bark.

The flowers are arranged in leaf axils in pairs or threes on a peduncle 0.8–1.0 mm (0.031–0.039 in) long.

Flowering has been recorded in September and October and the fruit is a hemispherical to conical capsule 1.6–1.9 mm (0.063–0.075 in) long.