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Food and Agriculture Organization of the United Nations - jatropha curcas - a bioenergy crop for the poor

jatropha, (genus Jatropha), member of the spurge family (Euphorbiaceae), native in both New World and Old World tropics and containing about 175 species of milky-juiced herbs, shrubs, and trees, some useful for their oils or as ornamental plants in tropical gardens.

A garden curiosity is tartogo, or gouty jatropha curcas (J. podagrica), from Guatemala and Honduras