Bentley R, Trimen H. Medicinal Plants. 4 vols. Delhi: Periodical Expert Book Agency and International Book Distributors; 1880 reprinted 1981.
British Herbal Medicine Association. British Herbal Pharmacopoeia. BHMA; 1996.
Esau K. Anatomy of Seed Plants, 2nd ed. New York, NY: John Wiley & Sons; 1977.
Evans WC. Trease and Evans’ Pharmacognosy, 14th ed. London: WB Saunders Company Ltd.; 1996.
Fernald ML. Gray’s Manual of Botany, 8th ed. New York: American Book Company; 1950.
Greenish HG. Materia Medica. Jodhpur: Scientific Publishers (India); 1920 reprinted 1999.
Greuter W, McNeill J, Barrie FR, et al., eds. International Code of Botanical Nomenclature (Saint Louis Code). Königstein, Germany: Koeltz Scientific Books; 2000. Regnum Vegetabile, vol. 138.
Hare HA, Caspari Jr. C, Rusby HH. National Standard Dispensatory, 8th ed. Philadelphia, PA: Lea Bros. and Co.; 1905.
Harris JG, Harris MW. Plant Identification Terminology: an Illustrated Glossary, 2nd ed. Spring Lake, UT: Spring Lake Publishing; 2001.
Mabberley DJ. The Plant-Book, 2nd ed. Cambridge: Cambridge University Press; 1997.
McGuffin M, Kartesz JT, Leung AY, Tucker AO. Herbs of Commerce, 2nd ed. Silver Spring, MD: American Herbal Products Association; 2000.
Miller RH. Root Anatomy and Morphology. A Guide to the Literature. Hamden, CT: Archon Books; 1974.
Pharmacopoeia Commission of PRC, eds. Pharmacopoeia of the People’s Republic of China, English ed., vol. 1. Beijing: Chemical Industry Press; 1997.
Raven PR, Evert RF, Eichhorn SE. Biology of Plants, 7th ed. New York, NY: W.H. Freeman and Co.;2005.
Tutin TG, Heywood VH, Burges NA, et al., eds. Flora Europaea. 5 vols. Cambridge: Cambridge University Press; 1964–1980. (1993: 2nd edition, vol. 1.)
Wichtl M, ed. Herbal Drugs and Phytopharmaceuticals, 3rd English ed. Stuttgart: medpharm Scientific Publishers and Boca Raton, FL: CRC Press; 2004.
World Health Organization. WHO Monographs on Selected Medicinal Plants, vols. 1 and 2. Geneva: World Health Organization; 1999–2002.
Youngken HW. Text-Book of Pharmacognosy, 5th ed. Philadelphia, PA: The Blakiston Company; 1943.
Zomlefer WB. Guide to Flowering Plant Families. Chapel Hill, NC: University of North Carolina Press; 1994.