Gossia gonoclada, known as the square-stemmed or angle-stemmed myrtle for the distinctive four raised corners on the angled branchlets, is a rainforest tree of the family Myrtaceae, native to south-east Queensland, Australia.

The species was first described in 1867 as Myrtus gonoclada by Ferdinand von Mueller,[1][2] and in 2003 was transferred to the genus, Gossia, by Neil Snow, Gordon Guymer and Sawvel.

[6][4] The leaves have four raised corners on angled branchlets, which are flushed pink when new, becoming dark green and glossy on the upper surface, duller and paler below.

The flowering period is from October to November, with the fruits ripening from mid-January to February.

[6] Its known distribution is restricted to remnant lowland riparian rainforest between the Logan and Brisbane Rivers.