World Ferns: Checklist of Ferns and Lycophytes of the World in the Catalogue of Life

WorldFerns and WorldPlants are synonymic checklists of the vascular plants of the world (including ferns and lycophytes). The data set has been compiled over the last 20 years by starting from the basic data of the Kew Index and the Index Filicum. These names (roughly 1 million) have been cross-checked against local floras, checklists and treatments. In the current status about 90% of the species names have been verified, and distribution data are available for about 80% of the countries (incomplete only for parts of tropical Africa and Brazil).