This section is from the book "A Manual of Materia Medica and Pharmacology", by David M. R. Culbreth. Also available from Amazon: Manual of Materia Medica and Pharmacology.
Phlox' Caroli'Na, Carolina Or Georgia Pink. This has a knotty and lighter colored rhizome with a central pith; it is also an anthelmintic, as is P. glaber'rima.
 
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