Palomar Community College District
Wayne's Word: The Castor Bean: Plant Named After a Tick
A fascinating article on the natural history and biochemistry of castor oil. There are sections that are basic and descriptive as well as more technical information.
Other
H Net: Castorbean History and Connection to Als
This site is a letter from a Graduate Student who believes he has discovered a connection between ALS, otherwise known as Lou Gehrig's Disease, and the Castor bean. The site also provides responses from scholars at various universities...
Smithsonian Institution
Smithsonian Education: Medical Technology
Many medicinal plants native to Africa found their way around the world and into modern medicine. Find out about five such plants at this informative site.
Science4Fun
Science4 Fun: Poisonous Plants
Learn interesting facts about poisonous plants including why they carry poison and how they are used. Also describes some common poisonous plants.