We think they could go it one better, however. It turns out that non-toxic subspecies of J. curcas are native to Veracruz and Quintana Roo States, and could be used to produce mast that is suitable for both human and domestic animal feed. ```````````````````````````````` Edible provenances of Jatropha curcas from Quintna Roo state of Mexico and effect of roasting on antinutrient and toxic factors in seeds H.P.S. Makkar, K. Becker and B. Schmook1 Institute for Animal Production in the Tropics and Subtropics (480), University of Hohenheim, D-70593 Stuttgart, Germany 1, ECOSUR, El Colegio de la Frontera Sur, Zona Industrial No.2, C.P. 77000, Chetumal, A.P. 424, Mexico http://www.jatropha.de/schmook1.htm