34 BLUE FLAG. 



chronic bronchitis, &c. In whooping cough and croup 

 it acts advantageously, and should be given until 

 vomiting results. As an external remedy the powdered 

 root or tincture acts energetically in cases of fungoid 

 tumours, ringworm, &c. In polypus of the nose it 

 should be used as a snuff. Large doses will produce 

 narcotic effects. 



Preparations Powdered root : Dose, 10-30 grains. 

 Tincture: Dose, -2 drachms. Tincture U.S. P. : Dose, 

 15 drops. Fluid extract : Dose, 10-30 drops. Solid 

 extract (ale.) : Dose, 5-8 grains. Sanguinarin : Dose, 

 J-i grain. 



Distinctive character The rhizome is usually about 

 2 or more niches long and nearly ^ inch in diameter, 

 reddish brown, and longitudinally wrinkled. Fracture 

 short, transverse section whitish, with numerous small 

 red resin cells, or sometimes wholly suffused with red. 

 Taste, bitter and acrid. Odour, heavy. 



BLUE FLAQ. Iris versicolor, Linn. 



N.O. Iridacecz. 



Syn. Water Flag, Poison Flag, Flag Lily, Liver 

 Lily, Snake Lily. 



Part used Root. 



Action Alterative, antisyphilitic, diuretic, cathartic, 

 stimulant. This is chiefly used for its alterative pro- 

 perties, and enters into many compounds for purifying 

 the blood and for venereal affections. It is also valu- 

 able in liver complaints, fluor albus, and dropsy. 



Preparations Powdered root : Dose, 20 grains as a 

 cathartic. Fluid extract : Dose, ^-i drachm. Solid 

 extract: Dose, 10-15 grains. Tincture: Dose, 1-3 

 drachms. Irisin : Dose, 1-3 grains. 



Distinctive character Rhizome with annual joints 

 2 or more inches long, about f inch in diameter, cylin- 

 drical, becoming compressed towards the larger end 



