SPERMATOPHYTA—GRAMINEAE— GRASSES 365 



Fig. 154. Quackgrass {Agropyron repens). The "roots" 

 (rootstocks) used in medicine. Tlie roots contain considerable 

 of a nutritious carbohydrate. (C. M. King.) 



Medicinal properties. Quack grass is not known to be poisonous. The 

 ancients since the time of Pliny have used the drug in medicine and it was also 

 used by the Germans in the 10th century. The root stock is officinal. Gerard 

 ascribed to the root diuretic, lithontriptic virtues or properties. The root con- 

 tains considerable sugar and a substance called triticin, an amorphous, gummy 

 substance easily transformed into sugar. It is found useful in the mucous dis- 

 charge from the bladder. Quack grass and Western Wheat Grass frequently con- 

 tain ergot. 



