Male Fern Root is a powerful anthelmintic, and an astringent. It is used to kill tapeworm. _Dose_, three drachms of the powdered root mixed in a teacupful of water, to be taken in the morning while in bed, and followed by a brisk purgative two hours afterwards; or from a tablespoonful to a wineglassful, according to age, to be taken early in the morning. (_See par 569_).