Austrobuxus is a genus of plants under the family Picrodendraceae first described as a genus in 1861. It is native to Southeast Asia, Papuasia, and Australia. The region with the highest diversity is New Caledonia.van Welzen, P.C. & Forster, P.I. (2010). A revision of Malesian Austrobuxus (Picrodendraceae/Euphorbiaceae s.l. subfam. Oldfieldioideae). Nordic Journal of Botany 28: 189-195. moved to other genera: Kairothamnus Longetia Scagea