Png yellow flowers castor oil plant botany sketch https://www.rawpixel.com/image/2611563/free-illustration-png-watercolor-herbal-plant-castor-bean-oilView licenseCastor oil plant (Ricinus communis): flowering and fruiting stem, leaf and fruit sections. Coloured lithograph after M. A.… https://www.rawpixel.com/image/13960530/image-flower-plant-artFree Image from public domain licenseA still life of castor bean, Ricinus communis containing the water soluble, highly toxic poison known as ricin. https://www.rawpixel.com/image/2288318/free-photo-image-still-life-castor-poisonFree Image from public domain licenseAn American castor-bean plant (Ricinus americanus). Drawing by Thomas Malie, ca. 1730. https://www.rawpixel.com/image/14014231/image-paper-plant-treeFree Image from public domain license