Commonly known as white yam, Dioscorea. Entangled network herbaceous Fujimoto, plants are growing medium, stems round, purple, sometimes with green stripes, right-handed, 3 to 5 meters long; branch less. Single leaf, stem, lower leaves are alternate, in upper leaves opposite, rarely whorled; blade length of 6.0 cm (4.1 to 8.0), 6.2 cm wide (3.5 to 9.0), petiole length of 5.4 cm (3.2 to 8.5); both sides smooth no pubescence, surface dark green, the back white; the margin entire, or sinuolate edge; base deep heart-shaped, wide heart-shaped tubers long cylindrical, 90 to 120 cm long, 3 to 5 cm in diameter, plant weight from 1000 to 1900 grams, longer shoots, 10-20 cm long; cross-section of pure white, dense, good quality; epidermis brown, dense fibrous roots, the tumor is large and dense, delicate taste and high nutritional value, pure green, pollution-free, since ancient times yam yam, mountain medicine "argument. 1963, Hutuohe floods the my village farmland in a north-south Hengqu, main gates of the flood blocked due Hutuohe Peking embankments, siltation cultivated more than one meter deep, resulting in upper village arable sandy soil, the following is a fertile ground for such a unique land conditions, such soil is very suitable for the growth of white yam. Over the years, the village farmers breed commonly known as "white mouth" quality Baishan drug types. Since the implementation of the production responsibility system, the majority of farmers have planted liberty, farmers began to white yam vegetable garden planting transferred to field planting acreage has expanded each year, the only village planted on up to 500 acres. White yam cultivation has gradually become an industry, and then radiation to the surrounding villages, into a piece of acreage even up to two thousand acres, yields of up to five million kilograms. In recent years, the white yam reputation far, the Local Mesh merchant as the Friends of Anping specialty gifts, be highly commended. "White mouth" white yam exported to Beijing, Tianjin, Guangzhou, Shanghai and other cities, by local people of all ages, the people on the table delicacies. In order to do bigger and more powerful white yam industry, the formation of the planting, management, storage, transportation, sale of train, in June this year, the village set up a the Kanghua white yam cooperatives ", registered a the Kanghua white yam trademark brand uniformly printed boxes and gift boxes, and laid a solid foundation for the grade level on the scale. The village will become the "white mouth" the white yam distribution center and sales center.