Medicosma heterophylla T.G.Hartley

Hartley, T.G. (2013) Flora of Australia 26: 91, 582. Type: Qld. Cook District. Track on Pinnacle Rock, 4 km W of Karnak, Qld, 12 July 1994, P.I.Forster 15541 et al.

Seldom exceeding 30 cm dbh.

Leaves trifoliolate and simple. Numerous oil dots visible with a lens. Leaf blades about 3.5-8 x 1.4-3.6 cm. Crushed leaves emit a conspicuous odour which is difficult to describe. Lateral veins forming loops inside the blade margin.

Pedicels about 2-3 mm long. Calyx marked with yellow oil dots. Petals about 1.5-2 mm long. Stamens eight, dimorphic, four long and four short. Staminal filaments flattened, margins fimbriate. Disk yellow, margin crenate or wavy. Style hairy and divided towards the base. Stigma yellow.

Fruits glabrous, 4-6 mm long. Seed characters unknown.

Features not available.

Endemic to NEQ, known along Roaring Meg Creek and the vicitiny of Karnak, Daintree River National Park. Altitudinal range from 450-1000 m. Grows as an understory tree in well developed upland and mountain rain forest.

Medicosma sp. Pieter Botte (B.Hyland 3503RFK).  Medicosma sp. Karnak (P.I.Forster PIF15541).