I have noticed that western style gardens _ such as those seen in big castles, for example _ characterize themselves by man_made forms that generally follow symmetric patterns. In contrast, Japanese gardens, while also man_made, always try to recreate lifelike landscapes, by using not only botanical elements but also water, gravel, rocks and other natural components. In a similar manner, when compared to western floral arrangements, Ikebana compositions also have a stronger emphasis in reproducing natural settings.
Single, larger blossom flowers, such as roses, carnations, zinnias, tulips or lilies, usually make up the focal points of a piece. Taller stems with multiple flowers can balance things nicely. Delphinium, gladiolus, and snapdragon are good examples of flowers that can add extra height and texture. "Filler" flowers, or stems with many small buds, are great for topping of a bouquet with a full and delicate look.