Begonia are mostly ornamental flowers and trees used for urban greening and beautification (although there are many varieties with high edible value). Many of them are famous ornamental plants, such as Xifu Begonia, Pendulous Begonia, Long-stemmed Begonia and Papaya Begonia, commonly known as "four products of Begonia", which are important flowering trees in temperate zones. Distributed in China, Shandong, Shaanxi, Hubei, Jiangxi, Anhui, Jiangsu, Zhejiang, Guangdong and Guangxi. Begonia belongs to Rosaceae and Malus. It is a famous ornamental tree species in China and cultivated everywhere. Gardening varieties include pink double petals and white double petals.