H. australis

H. australis may refer to:
 * Haageocereus australis, the Quisco De La Costa De Aric, a cactus species endemic to southern Peru and northern Chile
 * Hemiandra australis, a shrub species in the genus Hemiandra found in Australia
 * Hoya australis, the waxvine or common waxflower, a plant species found in Australia