Guide to Poisonous Plants – College of Veterinary Medicine and Biomedical Sciences – Colorado State University
Schematic overview of major components of the plant Ricinus communis | Download Scientific Diagram
Castor Bean, Ricinus communis – Wisconsin Horticulture
Ask the Master Gardener: Castor bean plants can be a dramatic addition to a garden - Brainerd Dispatch | News, weather, sports from Brainerd and Baxter
Castor Bean (Ricinus communis) - FineGardening
What Is Ricin | Bioterrorism Ricin | Live Science
Things No One Tells You About the Castor Bean Plant - Gardenerdy