Cassava is a shrub-like perennial crop. The stem is upright, woody, 2-5m high, single leaves alternate palmately and deeply divided, papery, lanceolate. Unisexual flowers, panicles, terminal, androgynous. Cassava was introduced to China in the 1920s. It was first cultivated in Gaozhou, Guangdong Province, and then introduced to Hainan Island. It is now widely distributed in South China, with the most cultivated in Guangxi, Guangdong and Hainan, Fujian, Yunnan, Jiangxi, Sichuan and Guizhou There are also introduction trials in southern regions of other provinces.