山药,最早见于《山海经》,名薯蓣,因唐太宗名预,避讳改为薯药;又因宋英宗讳署,改为山药,故自宋朝始称之为山药。山药系薯蓣科多年生缠绕性草木植物薯蓣除去外皮的干燥块根,有野生、家种、山地生、平地生等等,药用多以山地生及野生者 Yam, first seen in the “Shan Hai Jing,” the name of potato oysters, due to Tang Taizong prestigious, to avoid 讳 changed to potato medicine; also because of Song Yingzong 讳 Department, changed to yam, so since the Song Dynasty called yam. The yams Department of Dioscoreae is a perennial entwined grassy plant that removes the dry roots of the hulls. There are wild, domestic, mountainous, and flat lands. Medicinal products are mostly wild and wild.