山药,别名为怀山药、淮山,系薯蓣科植物薯蓣Dioscorece opposita Thunb. 的干燥根茎,具健脾、补肺、固肾和益精之功能。近年来,我省不少地区发现从外地大量流入一种伪品,经与福建仙游提供的带地上部分的大戟科植物木薯Manihot esculenta Crantz的块根样品进行一系列对比研究,我们认为该伪品即属木薯。木薯在我国南部各省区广泛栽培。块根富含淀粉,供工业用或食用。因含氢氰酸,常水浸去毒后方供食用,尚未见作药用的报导。鉴于木薯外形与山药相似,其伪制的饮片与山药更 Yam, which is also known as Dioscorea opposita Thunb., is a dried rhizome of Dioscorea opposita Thunb., which is known as yam and yam, and has functions of strengthening spleen, invigorating lungs, fixing kidney, and benefiting essence. In recent years, a number of areas in our province have been found to have inflowed a counterfeit product from a large number of places. After conducting a series of comparative studies with root samples of the cassava Manihot esculenta Crantz with the above-ground part of the cassava plant in Fujian Xianyou, we believe this The product is a cassava. Cassava is widely cultivated in various provinces and regions in southern China. The tuberous roots are rich in starch for industrial use or for consumption. Due to the inclusion of hydrocyanic acid, regular water immersion and detoxification are not yet available for consumption and have not been reported as medicinal. In view of the similarity between cassava and yams, its counterfeit slices and yams are more