This section is from the book "Botanic Drugs Their Materia Medica, Pharmacology and Therapeutics", by Thomas S. Blair. Also available from Amazon: Botanic Drugs, Their Materia Medica, Pharmacology and Therapeutics.
Dogwood, Cornus florida. Not official. A simple bitter, in action similar to other bitters. See "Gentian." Southern physicians esteem cornus as an antiperiodic and employ it in malaria. Heat destroys its active principle, cornin. Cornus is our best indigenous substitute for cinchona bark. Dose: fl. 1/2 to 1 fluidrachm.