The singles, the Japanese/anemones, the cactus and the itohs types have very sturdy stems. Some examples of the singles are Scarlet O'hara. Seashell, Krinkled White. Examples of the Japanese/Anemone are White Cap and Doreen. The cactus examples are Raspberry Rumba, Pink Luau, Green Lotus. Itohs include Bartzella, Cora Louise, Singin in the Rain.