The Royal Botanic gardens, Kew states that its mission is to apply scientific discovery and research to fully develop the information about and potential uses of plants and fungi.
Plants of the World Online is an online database launched in March 2017 as one of nine strategic outputs with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by 2020". It links taxonomic data with images from the collection, to provide a single point of access with information on identification, distribution, traits, conservation, molecular phylogenies and uses. In addition it serves as a backbone for global resources such as World Flora Online.
The International Plant Names Index includes information from the Index Kewensis, a project which began in the 19th century to provide an "Index to the Names and Authorities of all known flowering plants and their countries". The Harvard University Herbaria and the Australian National Herbarium co-operate with Kew in the IPNI database, which was launched in its present form in 1999 to produce an authoritative source of information on botanical nomenclature including publication details of seed plants, ferns and lycophytes. It is a nomenclatural listing of all published taxonomic plant names including new species, new combinations and new names at rank of Family down to infraspecific. It provides data for other related projects including Tropicos and GBIF.
Neotropikey
Information and key to flowering plants of the Neotropics.
The World Checklist of Selected Plant Families is a register of accepted scientific names and synonyms of 200 selected seed plant families. WCSP is widely used and most authoritative web resources on plants use it as their basis.
World Checklist of Vascular Plants
The World Checklist of Vascular Plants includes all known vascular plant species. It is derived from the WCSP and the IPNI and therefore only includes names found in those databases. It is the taxonomic database for Plants of the World Online. Since WCSP includes only selected families, WCVP will seek to complete the process.
World Checklist of Useful Plant Species
A checklist of 40,292 species, including nine non-plant taxa, compiled from multiple pre-existing datasets.
Kew also cooperated with the Missouri Botanical Garden and other international bodies in The Plant List. Unlike the IPNI, it provides information on which names are currently accepted. The Plant List is an Internet encyclopedia project which was launched in 2010 to compile a comprehensive list of botanical nomenclature. The Plant List has 1,064,035 scientific plant names of species rank of which 350,699 are accepted species names. In addition, the list has 642 plant families and 17,020 plant genera. It was last updated in 2013, and was superseded by World Flora Online.
World Flora Online
World Flora Online was developed as a successor to The Plant List, in 2012, aiming to include all known plants by 2020.