| CalFlora Database: provides access to information about all 8375 currently recognized plants in California, including more than 670,000 plant observations and 20,000 photographs. |
| Dr. Scott Russell's Botanical Links: Variety of informative, up-to-date, plant-related links from the Univ. of Oklahoma. |
| International Organization for Plant Information: Manages a series of cooperative international projects that aim to create plant taxonomic information databases; also includes useful general botanical links - commissioned by the International Union of Biological Sciences. |
| Internet Directory for Botany: an index to botanical information available on the Internet. It consists of two parts, an alphabetical directory and a categorical directory. |
| Internet Directory for Botany: Algae, Bryophytes, Fungi: links to many interesting sites in lower plants, e.g. algae, bryophytes and fungi. |
| MBG: W3TROPICOS: Database of plant names, information on them, and the sources of information. |
| Plants For a Future: A resource centre for rare and unusual plants, particularly those which have edible, medicinal or other uses. The site contains an online database of over 7000 plants. |
| Schoolhouse: Science: Botany Resources: A list of links related to various aspects of botany. |
| USDA PLANTS Database: Plant names, photos, fact sheets, and information on culturally significant plants, noxious and invasive plants, and threatened and endangered plants, with links to thousands of plant-related sites and software tools. |
| World-Wide Web Virtual Library: Botany: Collection of scholarly and research links for plant biology. |
Classical
