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Photographer’s Note

The castorbean plant (Ricinus communis) has been cultivated for centuries for the oil produced by its seeds. The Egyptians burned castor oil in their lamps more than 4,000 years ago.

Thought to be native to tropical Africa, the plant is a member of the spurge family. The seeds with hulls removed contain 35 to 55% oil. The seeds, leaves, and stems of the plant contain ricin and ricinine, which are poisonous to humans and animals. Eating a castorbean causes nausea, and eating several may cause death. These toxic compounds are not present in the oil.

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