The English word “Simple,” composed of two Latin words, Singula plica (a single fold), means “Singleness,” whether of material or purpose.
From primitive times the term “Herbal Simple” has been applied to any homely curative remedy consisting of one ingredient only, and that of a vegetable nature. Many such a native medicine found favour and success with our single-minded forefathers, this being the "reverent simplicity of ancienter times