We often associate fragrance with many flowers, indeed, scent is used to attract insects on the other hand, some flowers such as the arum a produce smells which are repulsive to us but attractive to insects such as flies. Having located the flower, the insect must be rewarded for its role in pollination. The most common reward is food. Both nectar, a sugary date from the phloem a pollen grains provide food for the different insect pollinators