The whole plant of Pyrola rotundifolia, Linné (Nat. Ord. Ericaceae). Damp and shady woods in the United States. Dose, 5 to 60 grains.
Common Names: Canker Lettuce, Shin Leaf, False Wintergreen.
Principal Constituents.—Ericolin, arbutin, urson, tannic, gallic and malic acids, etc.
Preparations.—1. Infusum Pyrolae, Infusion of Pyrola (1 ounce to Water, 16 fluidounces). Dose, 1 to 2 fluidounces.
2. Tinctura Pyrola, Tincture of Pyrola (8 ounces to Alcohol (76 per cent), 16 fluidounces). Dose, 1 to 60 drops.
Specific Indication.—Irritation of urinary tract.
Action and Therapy.—External. A splendid but much neglected agent in infusion, as a wash for sore throat and aphthous ulcerations of the mouth.
Internal. As it has similar properties to uva ursi and chimaphila and exerts a similar antiseptic action, it is of much value in urinary disorders with irritation and tendency to ulcerations and sepsis. The urine contains much mucus and sometimes blood.