Allocasuarina corniculata, commonly known as Tamma or the Tamma sheoak, is a shrub of the genus Allocasuarina native to the Wheatbelt and Goldfields-Esperance regions of Western Australia. The dioecious shrub typically grows to a height of 1 to 5 metres (3 to 16 ft). It produces red flowers between September and January and is found in tall heath growing in sandy, gravelly or lateritic soils.