Steam distillation of the leaf of a New England blackbutt,Eucalyptussp. nov. aff.campanulatagave an essential oil rich in E-methyl cinnamate withtrans-β-ocimene as minor component and methyl 2-methyl butyrate, α-pinene,cis-β-ocimene, Z-methyl cinnamate and α, β and γ-eudesmol as trace constitutents. Interpopulational studies showed a 2–6 percent range in oil yield with 94–99% E-methyl cinnamate content. The potential for the commercial development of this species in both plantations and natural stands was assessed.