A complete, synonymic checklist of the Ferns and Lycophytes of the World
Version 25.04 (April 1st, 2025)
Covering 13,170 accepted species,
819 hybrids, 950 accepted infraspecific taxa and 54,479 synonyms,
in total 69,418* 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
