The composition of the essential oils of different genotypes of Chamelaucium uncinatum has been examined. The major compounds were identified as α-pinene, citronellal, limonene, linalool and α-terpinyl acetate. Three chemotypes of C. uncinatum were identified based on the relative proportions of α-pinene, citronellal and limonene present. Oils with α-pinene as the principal constituent were the most common.