Haageocereus australis, the Quisco De La Costa De Aric, a cactus species endemic to southern Peru and northern Chile
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Hoya australis, the waxvine or common waxflower, a plant species found in Australia
Agathis australis | Terra Australis | Muehlenbeckia australis | Dinoponera australis | A Voyage to Terra Australis | Hellinsia australis | Emex australis | Celtis australis | Amanita australis | Xanthorrhoea australis | Utricularia australis | Terra Australis. | Terminalia australis | Smilax australis | Myrsine australis | Morus australis | Livistona australis | ''Kingia australis'' | Juglans australis | Indigofera australis | Hoya australis | Haageocereus australis | Flindersia australis | Elsinoë australis | Dryococelus australis | Diploglottis australis | Cyclorana australis | Cordyline australis | Baptisia australis |
Baptisia australis, the blue wild indigo or blue false indigo, a herbaceous perennial plant species native to North America
Elsinoë australis, a plant pathogen species that causes sweet orange scab
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Emex australis, the doublegee or three-cornered jack, a herbaceous plant species found in South Africa and Australia
Flindersia australis, the crows ash or Australian teak, a rainforest tree species found in Australia
Indigofera australis, the Australian indigo, a leguminous shrub species
Juglans australis, the Nogal Criollo, a plant species found in Argentina and Bolivia
Terminalia australis, a large shrub or tree species found in Argentina, Paraguay and Uruguay
Utricularia australis, a medium sized, perennial aquatic bladderwort species with a vast geographic range
Xanthorrhoea australis, the grass-tree or black boy, a plant species found in Australia