What aspects of a flower are taken into consideration when creating flower essences?

I recently read a very interesting explanation about the various attributes of plants and flowers that are studied in the process of making flower essences. For example, many flower essence practitioners talk about a flower's signatures in determining what qualities they may correspond with in terms of emotions. This article discusses 12 different attributes ranging from a flower's shape to whether it blooms in the daytime or nighttime. What aspects do you focus on when creating your own flower essences? Leave us a comment in the Comments section by clicking on this post's title.