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Ver. 18.4
Feb. 11th, 2024

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

Version 18.4 (Feb. 11th, 2024)

Covering 13,106 accepted species,
857 hybrids, 952 accepted infraspecific taxa and 54,244 synonyms,
in total 69,159* 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

In cooperation with Catalogue of Life