This section is from the book "The Thomsonian System Of Medicine", by R Swinburne Clymer. Also available from Amazon: Medicines of Nature: The Thomsonian System.
The root of the Dewberry, and also that of the blackberry plant, may be used as a substitute for Bayberry, or Sumac, in dysentery and in bowel complaints in general.
Dose, same as the Bayberry. The Dewberry is also known officially as Rubus Canadensis.
 
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