Castor is a plant that produces seeds. Castor oil is produced from ripe seeds that have had their outer covering (hull) removed. Castor oil has been used as a medicine for centuries. The hull of the castor seed contains a deadly poison called ricin. Ricinus communis, the castor bean or castor oil plant, is a species of perennial flowering plant in the spurge family, Euphorbiaceae. It is the sole species in the monotypic genus, Ricinus, and subtribe, Ricininae. Origin of Gujarat, Rajasthan, Andhra Pradesh, Telangana,