IRIS. 



271 



Parts Used.— The rhizome and rootlets. Official name : Iris— United 



States Pharmacopoeia. 



Constituents.— Besides common vegetable principles iris contains an 

 acrid resin, upon which its medicinal activity depends. 



Fig. 158.— Iris versicolor. 



■B-^mftons.-Extractumiridis-extractofiris; extraction iridis flui- 

 dum-flmd extract of ms—United Stales Pharmacopoeia. A saturated 

 tincture made from the fresh rhizome is an excellent preparation 



Medical Properties and Uses.-te*, in full doses, is an active emeto- 

 catlmrtic, operating with violence, and producing considerable prostration. 

 Its effects upon the liver appear to be analogous to those of podophyllum. 

 In sick headache dependent upon indigestion, small doses, frequently re- 

 peated, often act most happily. It has been largely used by eclectic prac- 



