Abstract The essential oil of the leaves and stems of Calycolpus australis, collected in Minas Gerais, Brazil and examined by GC/MS, is dominated by γ-terpinene (14.07±2.92%), terpinen-4-ol (13.11±1.03%), linalool (12.52±0.91%) and α-terpinene (11.53±1.93%).