Violet as a note often comes to us from old fashioned molecules called ionones. They recall the early 20th century, and sweetly fill out the heart of many fragrances.
A perfume in itself, ylang is the smell of paradise isles real and fantastical. I have found it growing in the Caribbean and was astounded by its depth. Overripe banana, vanillic, with a bready malt. It is a well-known cheaper alternative to modifying white flowers like jasmine and gardenia. Ylang ylang has a watery quality that is fresher and more calming than other tropical flowers. Indeed, it is used to relax in aromatherapy (I bring it on planes to sniff).