Oryza australiensis is a wild rice species native to monsoonal northern Australia.

[5] O. australiensis is unique among other Oryza for its resistance to abiotic stresses, particularly from heat, and having the largest genome in the genus.

[7] O. australiensis is more slender than domesticated rice, and has a high gelatinization temperature and content of amylose, meaning it doesn't stick together after cooking.

[8] O. australiensis is a wild relative of other rice species and endemic to the tropical regions of northern Australia.

Heat shock experiments on O. australiensis have found that at 45 °C (113 °F), its ability to properly shoot biomass and leaf elongate was unaffected and soluble sugar concentrations tripled during the period of extreme heat, showing its robust carboxylation capacity and thermal tolerance.

[12] It also carries genes that help it resist diseases, bacterial blights and insects such as brown planthoppers (BHP).

Its size is due to long terminal repeat retrotransposon (LTR-RTs) families, which make up around 65% of its genome.