Allocasuarina duncanii
Allocasuarina duncanii, commonly known as Duncan's sheoak, is a small tree of the genus "Allocasuarina" native to Tasmania. The small tree has a conifer habit and typically grows to a height of . "Allocasuarina duncanii" is known from ten populations with a range of approximately . The estimated number of mature individuals is between 120,000 and 150,000. The species is found in Snug Tiers, the East and West Wellington Ranges, Ridgeway and South Bruny Island in the south east of Tasmania. Growing in a dolerite substrate at a height of .