This section is from the book "Botanic Drugs Their Materia Medica, Pharmacology and Therapeutics", by Thomas S. Blair. Also available from Amazon: Botanic Drugs, Their Materia Medica, Pharmacology and Therapeutics.
Corn Silk, Zea mays. Was official in the U. S. P VIII, and is noted in the French, Mexican, and Spanish standards. Maizenic acid is the active diuretic agent in corn silk, which is worked green in making the fluidextract.
A mild but reliable diuretic in full dosage, 1 to 2 fluidrachms fl. It is used in the treatment of acute and chronic cystitis, pyelitis, etc., its demulcent properties making it safe and mild in action. An infusion made with boiling water may be used freely.