Rubus villosus (allegheniensis) - Blackberry
"CONSTITUENTS: Villosin, tannin, gallic acid.
PREPARATIONS: Extractum Rubi Fluidum, Fluid Extract of Rubus. Dose: from ten to sixty minims. Specific Medicine Rubus. Dose: from five to thirty minims.
Therapy: In those cases of diarrhea where there are large, watery, clay-colored discharges three or four times each day, an infusion of blackberry root will sometimes correct this entire train of symptoms. A syrup of blackberry will also answer an excellent purpose."
(Finley Ellingwood: The American Materia Medica, Therapeutics and Pharmacognosy, 1915)