text: The castor oil plant , Ricinus communis , is a species of flowering plant in the spurge family , Euphorbiaceae . It belongs to a monotypic genus , Ricinus , and subtribe , Ricininae .
simplified: The castor oil plant ( Ricinus communis ) , is a plant species of the Euphorbiaceae , the sole member of the genus Ricinus and of the subtribe Ricininae .