Plant Encyclopedias

• Science: Biology: Botany: Directories 

• Botanical.com  - Contains index of plants and herbs, plant recipes and poisons. With references and other related information.
• Botany.com  - Houses a wide range of plant information; common and botanical names, dictionary, pest and diseases, gardens, associations, societies and more.
• Lapshin's Succulent Encyclopedia  - Information and photo gallery of succulent plants of numerous families, including about 5000 photos of different leafy succulents.
• Metropolitan Plant Encyclopedia  - Showcases the different plants of the New York metropolitan region. Plus get research, education and membership.
• Palm Encyclopedia  - Includes scientific description and taxonomy, identification keys, evolution and fossil record, conservation, horticulture and more.
• Plant Encyclopedia Database  - Features a large encyclopedia and plant database and containing plant identification of thousands of species.
• United Stated Department of Agriculture PLANTS Database  - Provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories. Includes search by common name as well a scientific name.