Dr. Scott Russell's Botanical Links - Variety of informative, up-to-date, plant-related links from the Univ. of Oklahoma. 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. 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. 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. World-Wide Web Virtual Library: Botany - Collection of scholarly and research links for plant biology. 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.