Insect attraction and pollination of flowers are controlled by characters such as color (visual cue); shape (accommodation); opening and pollen dehiscence (timing); volatiles production (smell); and nectar secretion from nectary glands (reward). The floral nectary [ I-3, 6, 7] and its secretion products are two important aspects of a larger, basic-biological study of ours dealing with production of hybrid soybean [4, 5].