A vector that can recognize this odor and fly up the concentration gradient of this fragrance, can easily find the next flower of a particular species. Flowers have evolved a wide array of odors to assist in attracting vectors. Humans have limited appreciation of and vocabulary for fragrances, but other animals are quite discriminating. The flower has to be designed to accomodate the vector and prevent pollen and nectar robbers from stealing the rewards. The shape can also make a flower more attractive.
Flowers pollinated by hovering vectors generally hang down and have long styles and filaments.
A beetle-pollinated flower needs to have easy entrance as beetles are clumsy in flight. Non-hovering insects and birds need perches or landing platforms as part of the flower. The sizes and shapes of the flower parts and their alignments are critical to assure pollination when the vector does visit. Moreover, the body alignment while the proboscis is in the nectar spur is critical to the pollination event. In lecture I go over a few examples that integrate these concepts.