Another variety of "Chrysanthemum" used for the production of pyrethrins is the pyrethrum chrysanthemum. It featured flowers like the peony and chrysanthemum and silk tassels. This shaomai is named for its opening resembling the chrysanthemum flower petal shape. Other commercially important plants affected include basil, beans, carnation, chrysanthemum, peas, and watermelon. The city flowers are the Chinese rose and chrysanthemum. Chrisann was named after the flower chrysanthemum. This has become a problem in some greenhouse floral crops like Chrysanthemum and Carnation. The chrysanthemum is also the flower of November. The chrysanthemum is the city flower of Kaifeng. The way the flowers were grown and shaped also developed, and chrysanthemum culture flourished. They are also grown into chrysanthemum bonsai forms. Other genetically modified ornamentals include "Chrysanthemum" and "Petunia". In Japan, a form of "bonsai" chrysanthemum was developed over the centuries. Persian powder is an example of industrial product of chrysanthemum insecticide. Members of this genus are sometimes also placed in the genus "Chrysanthemum".