IRIS. 271 



Paris Ui^rd. — Tho rhizomo and rootlets. Official name : Iris — I'niled 

 States I'harmacopd'in. 



Con.^tUurnts. — Besides coinmon vegotahlo priiiciplea iris coutaiusi an 

 acrid retin, upou which its medicinal activity depeud«. 



Fio. 158.— Iris vciKicoIor. 



Prepnrntions. — Extractum iridis — extract of iris ; extractum iridis flui- 

 dum — fluid extract of iris. — United Stales Pharmacopam. A saturated 

 tiucture made from the fresh rhizome is an excellent preparation. 



Medical Properties and Uses. — Iiis, in full doses, is an active emeto- 

 cathartic, ojierating with violence, and producing; considerahle 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- 



