A leaf from the South Australian blue gum, Eucalyptus leucoxylon, photographed against a coloured background. The leaf has been attacked by the larvae of the leaf skeletoniser moth, Uraba lugens, clearly revealing the vascular system. The whitish silk threads left by the larvae are still visible clinging to the skeletonized leaf. The leaves from all the eucalypts yield eucalyptus oil, although only 20 species are exploited commercially. Medicinal oil is used in soaps, gargles and lozenges; it is an antiseptic & stain remover. Its active therapeutic agent is cineole. The oil is used industrially as a deoderant and as a source of thymol and menthol.