Gaudium coriaceum, commonly known as green tea-tree[2] or mallee teatree,[3] is a shrub species that is endemic to south-eastern and south-central Australia.

It has smooth bark on the younger stems, elliptic to narrow egg-shaped leaves, white flowers and woody fruit.

Flowering occurs from June to October or November and the fruit is a woody capsule 5–8 mm (0.20–0.31 in) wide and that falls off the plant when the seeds are released.

[2][3][4][5][6] This species was first formally described in 1856 by Ferdinand von Mueller who gave it the name Fabricia coriacea and published the description in a paper in the journal Nederlandsch Kruidkundig Archief.

)[7][8] In 2023, Peter Gordon Wilson transferred the species to the genus Gaudium as G. coriaceum in the journal Taxon.