Vitis davidii Foex is an eastern Asia wild resource that belongs to Vitaceae family . Its natural range is in Shianxi,southern Gansu, Yunnan-Guizhou Plateau and the Yangtze River, and often distributes in the valley below the altitude of 1500m or beside the woods edge. Vitis davidii Foex is a vigorous plant with rough leaves , thick shoots with upright or slightly curve peel thorns , long tassel (above 20cm), big fruit (15mm or more in diametre) which is tasteless and late-ripen , thickness pericarp , high ...