味甘．入足厥阴少阴经．功专补精血．得杜仲、萆 治肾虚腰痛．得青盐、川椒治肝虚目暗．叶名天精草．苦甘而凉．清上焦心肺客热．代茶止消渴．子酒润捣用．得熟地良．便滑者宜避．