The essential oil obtained by hydrodistillation of the leaves and twigs of Prostanthera staurophylla (Lamiaceae) native to the NSW New England Tablelands was investigated by GC/MS, NMR and FTIR. The shrub yielded 2.1% (fresh weight) of an oil rich in terpenoids including the rare Î±-phellandren-8-ol (5.7%). Other significant contributors to the mint-like aroma of the oil were found to be limonene (26.9%), Î±-pinene (10.7%), verbenone (8.4%), camphor (3.9%), and chrysanthenone (2.1%).