Botanical name: 

A decoction or infusion of the common Scouring Rush, acts as a mild and simple diuretic, and as such it has been used in gravel, dropsical affections, irritation and inflammation of the urinary organs, strangury, suppression of urine, and other similar affections.

The American Eclectic Materia Medica and Therapeutics, 1898, was written by John M. Scudder, M.D.