A complete, synonymic checklist of the Ferns and Lycophytes of the World

Version 12.9 (January 2022)

Covering 12,931 valid species, 937 valid infraspecific taxa and 64,634 synonyms

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 pictures of 1,374 taxa

Assembled through 30 years independently from other databases

In cooperation with Catalogue of Life