A complete, synonymic checklist of the Ferns and Lycophytes of the World
Version 26.05 (May 20th, 2026)
Covering 13,274 accepted species,
832 hybrids, 940 accepted infraspecific taxa and 54,668 synonyms,
in total 69,714* names
[*about 1,200 dubious, "unplaced" names are omitted from the main database and listed under "Unplaced names"]
With complete, detailed distribution data (countries and regions) and literature references
Arranged in linear phylogenetic sequence reflecting true relationships
Fully searchable and continously updated
With 4,677 pictures of 1,435 taxa
Assembled through 40 years independently from other databases
