1. Gerard J. The Herball or General Historie of Plants. London: 1597.
2. Banckes R. Here Begynneth a New Mater, the Which Sheweth and Treateth of Ye Venues and Propyrtes of Herbes, the Whiche Is Called an Herball. London: 1525.
3. American Medicinal Plants: An Illustrated and Descriptive Guide to Plants Indigenous to and Naturalized in the United States Which Are Used in Medicine;Millsbaugh,1974
4. Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural;Porcher,1863
5. A Modern Herbal. The Medicinal, Culinary, Cosmetic and Economic Properties, Cultivation and Folk-Lore of Herbs, Grasses, Fungi, Shrubs and Trees;Grieve,1931