Siphonodon membranaceus F.M.Bailey

Tree to 25 m, glabrous. Branchlets not pendulous. Leaves lanceolate, oblanceolate or elliptic, acuminate, rarely acute or obtuse, entire or remotely crenulate, chartaceous; lamina mostly 6-15 cm long and 2-5 cm wide; base shortly decurrent or rarely obtuse; secondary veins 6-9 pairs; petiole 3-6 mm long; stipules 0.8-2 mm long. Cymes c. 2 cm long, of 1 to several flowers; pedicels 3-4 mm long. Sepals ±semicircular, 1.2-2 mm long. Petals obovate or nearly circular, c. 4 mm long, greenish yellow. Stamens 2 mm long, 1-1.2 mm wide; staminodes 0. Pistillar body 5-angled and 5-lobed; lobes opposite filaments; ovules 30 or more; style-like column projecting 0.5 mm beyond hollow apex of ovary. Fruit globular or depressed-globular, 4-5.5 cm diam., yellow or orange.

A tropical plant. It grows naturally in the rainforest in NE Queensland in Australia. It grows from sea level to 1000 m altitude.