The smell of flowers can enliven, relax, or induce happiness. It can instantly call up memories. Smell is a very powerful sense, and it is said that it evokes memory more so than the other four senses. Roses can bring on a happy mood in one sniff. The scent of lavender induces sleep. Lilac flowers evoke sensations of antiquity. Within these generalities, flower scents can mean something different for each individual.