The essential oil content of the leaves ofEucalyptus radiataSieb, ex DC subsp.robertsonii(Blakely) L. Johnson et D. Blaxell. varied from 6.7% to 8.4% (DWB) during different seasons. GC/MS analysis of the oil led to the identification of 24 constituents comprising 96.3% of the oil. The major component was 1,8-cineole (74.25%) followed by α-terpineol (11.6%) and limonene (4.5%). The oil content is highest among all the reportedEucalyptusspecies and as it is devoid of α-and β-phellandrene, it complies with the specifications of the British and U.S. Pharmacopoeias for Eucalyptus oil without any rectification