1. (a) Martínez, M.Las Plantas Medicinales de México; Ediciones Botas: Mexico City, 1989; p 486.
2. (b) Cano Asseleih, L. M.Flora Medicinal deVeracruz. Inventario Etnobotánico; Universidad Veracruzana: Xalapa, Mexico, 1997; pp 184−185.
3. In Mexico, traditional healers classify illnesses and herbal remedies as “hot” or “cold”. A hot−cold imbalance must be redressed by the ingestion of contrary elements. For the hot−cold dichotomy, see: (a) López Austin, A.The Human Body and Ideology. Concepts of the Ancient Nahuas; University of Utah Press: Salt Lake City, 1988; pp 270−282. (b) Ortiz de Montellano, B. R.Aztec Medicine, Health, and Nutrition; Rutgers University Press: New Brunswick, NJ, 1990; pp 213−235.
4. Biodynamic Constituents in the Mexican Morning Glories: Purgative Remedies Transcending Boundaries