Medicosma forsteri is a species of small tree in the family Rutaceae and is endemic to a restricted area of Queensland.

It has elliptical leaves and cream-coloured flowers borne singly or in small groups in leaf axils.

The petals are cream-coloured, about 5 mm (0.20 in) long, densely covered with flattened hairs on the back and part of the front.

[2] Medicosma forsteri was first formally described in 1985 by Thomas Gordon Hartley in the Australian Journal of Botany from specimens collected in 2000 near Mount Mellum by Paul Irwin Forster.

[3] This medicosma is only known from the type location where it grows at an altitude of 220 m (720 ft) in rainforest dominated by bangalow palm (Archontophoenix cunninghamiana).