15 Best Flowers to Plant in Spring Carnivorous Plants: The Meat Eaters of the Plant World Think Blue Marble BOTANY LESSON: Types of Roots A book we read earlier mentioned 3 main types of roots: fibrous roots, taproots, and adventitious roots. I already had some roots from the produce department, but Nuclear Plant Containment Failure: Robusted Union of Concerned Scientists Early Summer Blooms The Martha Stewart Blog What's that?! This is the Castor Oil Plant, also known as the Castor Bean plant. This is the plant used to produce castor oil, which has uses in medicine, cosmetics, and industry.