宣水大黄
大黄系常用药材,大黄主产甘肃,其质量最优者为礼县氧。大黄植物名掌叶大黄,原系野生,近年来颇多栽培,其根茎及根供药用。性味苦寒,有攻积导滞、泻火凉血、活血祛淤,利胆退黄等功效。另外也可作染料,香料和酿酒工业的配料。
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