Dahuaweilingxian;Clematidis Courtoisii Herba seu Herba Sources:The drug is the dried or fresh whole herb or root of Clematis courtoisii Hand.-Mazz.(Family Ranunculaceae),growing on hillslopes,in sparse woods or scrubs along streams or roadsides,distributed in Henan,Anhui,Jiangsu,Zhejiang and Hunan of China. Actions and Indications:The root is used as antitoxic and diuretic,blood-activatos for the treatment of abnormal distension,constipation and dysuria,toothache,punctate opacity nebula due to acute conjunctivitis.The whole herb is used for snake-bite.