"To discover and share knowledge about plants and their environment in order to preserve and enrich life." – Missouri Botanical Garden mission. Founded in 1859, the Missouri Botanical Garden is the United States' oldest botanical garden in continuous operation and a National Historic Landmark. The Garden is a center for botanical research and science education, leading the development of botanical datasets shared here, including Tropicos http://www.tropicos.org and eFloras http://www.efloras.org. These authoritative botanical datasets published by Missouri Botanical Garden contain an aggregation from more than 200 years of floristic surveys and nomenclatural research. They contain descriptive information about the plants growing in various geographic regions, including species descriptions, identification keys, and digital images of herbarium specimens as well as live plants in situ. Tropicos provides a shared, web-based editing environment that allows project participants in geographically disparate areas to collaborate and share knowledge about plant life.