Synopsis Flowering plants represents one of the largest groups of primary producers. Their contribution to the production of oxygen as well as that to the nutriments of animals and man is consequently large. Typically, flowering plants are organised into an underground rout and a shoot above ground that consists itself of a stem and leaves. The organs of a plant that serves sexual reproduction are the flowers. Part of the pollinated flower ripens and becomes the fruit. In contrast to many other plant groups, flowering plants are striking, numerous and common. The useable plants among the flowering plants are directly or indirectly- the basis of human existence, they are, too, an important economical factor.