Eucalyptus globulus — commonly known as the Tasmanian Blue Gum — is a fast-growing evergreen native to the islands and coastal regions of southern Australia. It was first formally recorded in Tasmania in 1792 and is credited among the tallest flowering plants on Earth, reaching heights above 90 metres. The species was formally described and named by the French botanist Jacques Labillardière after his participation in the Bruni d'Entrecasteaux expedition.
Commercial distillation of the oil began in Victoria, Australia around 1852, driven in large part by the pharmacist and naturalist Joseph Bosisto, who pioneered the essential oil industry in Australia. The medicinal value of the oil — particularly its powerful antiseptic and respiratory-clearing qualities — was quickly embraced by physicians in the nineteenth century. By the turn of the twentieth century, eucalyptus oil was a fixture of colonial medicine chests from India to South Africa.
The tree's remarkable ability to absorb vast quantities of groundwater made it a strategic tool in swamp drainage programs throughout the Mediterranean basin, reducing the standing water that sustained malaria-carrying mosquitoes. This dual utility — agricultural land reclamation and medicinal resource — drove widespread global cultivation across Spain, Portugal, California, India, and the African continent.
Today, Eucalyptus globulus is cultivated commercially across India, China, Portugal, Spain, South Africa, and Brazil. India has emerged as one of the significant producers, with large-scale plantation forestry enabling consistent supply of high-purity steam-distilled oil meeting international pharmacopoeia standards. For further botanical context, see the Royal Botanic Gardens Kew profile and the CABI Invasive Species Compendium entry.