Catalog of the names of plants in the living collections of the Arnold Arboretum of Harvard University (gopher service)
Harvard University Herbarium Type Specimen catalog, gopher service. Also the Farlow Herbarium Diatom catalog.
National Museum of Natural History, Smithsonian Institution, Washington DC, Botany Department Type Specimens register, gopher service. Also the Flora of the Guianas.
World Conservation Monitoring Centre, Cambridge, England Threatened Plants of the World has species lists with conservation status. Examples provided for the continent of India.
Australian Plant Name Index APNI gopher service maintained at the Australian National Botanic Garden, Canberra. Includes the Census of Australian Vascular Plants (CAVP)
TROPICOS and other databases, access via Remote Managing Gibabytes (sic). Also image database of Madagascar.
California Academy of Sciences, San Francisco, Botany Department Herbaria Type Catalog gopher service
United States Department of Agriculture, Agricultural Research Service, GRIN - Germplasm Resources Information Network