⊛ learn · lesson 7
notes that fool you
a buried stem, a whale, a wounded tree
notes with a secret.
tap a note to see where its smell really comes from.
the iris is underground.
natural iris material comes from the rhizome, an underground stem often called orris root. it is washed, dried for months and left to age; the powdery smell forms slowly during that time.

oud starts with stress.
a healthy aquilaria tree has no oud. the fragrant wood forms when the tree is injured or stressed, often by a wound and fungi.

sources
- Roger et al. 2010 · iris rhizomes (Phytochemical Analysis)
- Givaudan · orris butter
- Patent EP3127994 (iris, irones)
- Natural History Museum · what is ambergris?
- Tan et al. 2019 · agarwood induction (Frontiers in Plant Science)
- ScenTree · Calone
- Nez · salty notes, sea spray and tastebuds
- Takasago · patent US9464257 (muguet)
- Anonis · Perfumer & Flavorist 1986/87
- ICAR Indian Institute of Spices Research · vanilla
- dsm-firmenich · muscone
- University of Bristol · molecule of the month, muscone