山(shan)(shan)藥是薯(shu)蕷(yu)科薯(shu)蕷(yu)屬植(zhi)物,纏(chan)繞草質藤本(ben),其莖通常(chang)(chang)帶紫紅(hong)色,右旋,無毛,花期為(wei)6-9月,果期為(wei)7-11月。其分布于(yu)朝鮮、日本(ben)和中(zhong)(zhong)(zhong)(zhong)國;在中(zhong)(zhong)(zhong)(zhong)國分布于(yu)河南(nan)、安徽、江蘇、浙江、江西(xi)、福建(jian)、臺灣、湖北、湖南(nan)、廣東(dong)、貴州(zhou)、云南(nan)北部(bu)、四川(chuan)、甘肅東(dong)部(bu)和陜西(xi)南(nan)部(bu)等(deng)地(di)。生長于(yu)山(shan)(shan)坡、山(shan)(shan)谷林下,溪邊、路旁的(de)灌叢(cong)中(zhong)(zhong)(zhong)(zhong)或雜草中(zhong)(zhong)(zhong)(zhong)。塊莖為(wei)常(chang)(chang)用(yong)中(zhong)(zhong)(zhong)(zhong)藥“懷山(shan)(shan)藥”,塊莖富含淀(dian)粉,可(ke)供蔬食;入藥能清熱(re)解毒、補脾胃虧損,治氣虛衰弱、消化不(bu)良、遺(yi)精、遺(yi)尿及無名腫毒等(deng)。