Reference point
A cluster of tiny orange-yellow osmanthus flowers, smelled from half a hand’s span away.
Do this before you read on. An entry only works when you have just smelled the thing.
Sweet like ripe apricot, with a faint leathery note and a powdery layer. Very distinctive, unlike any other flower in the dictionary.
The strange thing is that the flowers are tiny but the smell is very strong for their size. A fingertip-sized cluster of osmanthus carries further than a champaca flower ten times larger.
The ripe-apricot note comes from lactones, the same group found in toasted coconut and ripe peaches. Here again a flower borrows the language of fruit, as ylang-ylang does.
How to smell it
Find an osmanthus tree in flower in autumn. Smell from half a hand’s span away rather than up close — the smell is very dense for the size of the flower. Compare with a dried apricot if you have one.
Why this one is hard
Because the osmanthus tree is uncommon in the south and flowers only for a short season.
Scientific note
The ripe-apricot note of osmanthus comes from lactones, the same group that gives a fatty, creamy feel to toasted coconut and condensed milk. They are not fats, but the brain interprets them as the presence of fat. It is one of the clearest examples of smell suggesting a texture, not just a smell.
In Vietnamese life
Osmanthus is used to scent tea and make preserves in China and northern Vietnam. In international perfumery, osmanthus absolute is one of the most expensive and sought-after materials of the twenty-first century.