1. The scent of a flower.
Petunias have a heavenly scent in the early part of summer, before they have been pollinated. It is especially evident at dusk. Once the bees and others have done their work, there is no longer any reason to invest in this kind of manufacturing, which was only done to attract the pollinators in the first place, so they stop putting out. Hmmm. Sounds familiar...
At one time, petunia gardeners spent half the summer pinching off dead blossoms to ensure that they would continue to produce flowers and not seeds. The latest hybrids no longer require that pleasant labour as they are bred to keep producing blossoms no matter what.
3. An illustrious and sometimes dangerous family.