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    椒蒿

    别名】灰蒿、蛇蒿
      
    【来源】
      药材基源:为菊科植物龙蒿的全草根。
      
    拉丁植物动物矿物名:Artemisia dracunculus L. [A. glauca auct. Non Pall.ex Willd.]
      采收和储藏:夏季末末开花时割取地上部分,阴干。9-10月挖根,洗净,晒干。
      【原形态】龙蒿 多年生草本,高50-150cm。根粗大或略细,木质,常生有地下茎。茎直立,丛生,下部木质,分枝开展。叶无柄;中部以上叶密集,叶片线状披针形或线形,长3-7cm,宽2-3mm,先端渐尖,基部渐狭,全缘;上部叶与区片叶略短小,线形或线状披针形,长0.5-3cm,宽1-2mm。头状花序多数,近球形、卵球形或近半球形,于茎顶或枝端排列成稍密集的复总状花序;总苞球形,直径2.5-3mm,总苞片3层,外层卵形形,背面绿色,中、内层卵圆表或长圆形,边缘宽膜质;花外层雌性能育,约6-10朵;内层峡谷性花不育,约8-14朵。瘦果倒卵形或椭圆状倒卵形。花、果期7-10月。
      【生境分布】
      生态环境:生于干也坡、草原、林缘、路旁、田边及干河岸和亚高山草甸。
      资源分布:分布于东北、华北、西北等地。
      【性味】味辛;微苦;性温
      【功能主治】祛风散寒;宣肺止咳。主治风寒感冒;咳嗽气喘。
      【用法用量】内服:煎汤,10-15g。

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