Medicosma obovata is a species of shrub or small tree in the family Rutaceae and is endemic to a restricted area of far north Queensland.

It has simple egg-shaped leaves with the narrower end towards the base and white flowers borne singly or in small groups in leaf axils.

Medicosma obovata is a shrub or tree that typically grows to a height of 6 mm (0.24 in) and has glabrous leaves and branchlets.

The petals are white, 4.5–7 mm (0.18–0.28 in) long, densely covered on the back with soft hairs flattened against the surface and the eight stamens alternate in length.

[2][3][4] Medicosma obovata was first formally described in 1985 by Thomas Gordon Hartley in the Australian Journal of Botany from specimens collected on Mount Dryander in 1967.