This sought-after perfumer’s ingredient is literally worth its weight in gold. Native to the eastern Himalayas, the osmanthus tree is a small shrub with evergreen leaves and pale spring flowers that smell of peaches and apricots - it is these flowers from which osmanthus oil is extracted. The scent is particularly adored in China, where legend has it that a huge osmanthus tree grows on the moon, along with the fairy Chang E, her pet Jade Rabbit and the giant Wu Chang.