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.
Couch-Grass, Agropyron repens or Triticum re-pens. Official in the U. S. and many other countries.
Triticum is an excellent demulcent, but it is not appreciably diuretic; it contains no active agent. Its demulcent properties render it a good agent to combine with the irritant diuretics, or with the balsamic and terebinthinate diuretics used in the treatment of chronic affections of the genito-urinary tract. The infusion may be freely used; the dose of the fl. is 2 fluidrachms. Triticum is a good drug to use during fevers to aid in prevention of renal involvement.