 It has been difficult to distinguish from the similar "T. mongaensis", but microscopic analysis has revealed that "T. oreades" has features termed sclereids while "T. mongaensis" does not.The two are sister species, and their next closest relative is the Tasmanian waratah ("T. truncata").A disjunct northern population of "T. oreades" grows together with "T. mongaensis" in the southern Monga Valley in southern New South Wales, with some hybrids reported.