The Blechnum occidentale (Blechnaceae, Polypodiopsida) species group in southern and southeastern Brazil

A synopsis of the exindusiate species of Cyathea (Cyatheaceae-Polypodiopsida) with bipinnate-pinnatifid or more complex fronds, with a revision of the C. lasiosora complex

Revision of the fern family Marattiaceae in the Seychelles with two new species and a discussion of the African Ptisana fraxinea complex.

Two new species of Ctenitis (Dryopteridaceae) from South America and taxonomic notes on similar species

Pteris langsonensis (Pteridaceae), a new brake fern species from Lang Son Province, northern Vietnam

Adiantum × ailaoshanense (Pteridaceae), a new natural hybrid from Yunnan, China

Leptochilus oblongus (Polypodiaceae), a new fern species from northern Vietnam

Lectotypification of Selaginella tenuissima and S. papagaiensis (Selaginellaceae) with the description of S. monticola

Taxonomic revision of the Pteris cadieri complex (Pteridaceae)

Neotypification of Urostachys vorwerkii (Lycopodiaceae)