B. australis may refer to: Baptisia australis, the blue wild indigo or blue false indigo, a herbaceous perennial plant species native to North America Barbosella australis, an orchid species Brunonia australis, the blue pincushion or cornflower, a perennial herbaceous plant species found in Australia Botryosphaeria australis, a synonym for Neofusicoccum australe, a fungus species
See also Australis (disambiguation)