Llavea is a monotypic genus of fern in the family Pteridaceae.

The sole species is Llavea cordifolia.

The genus was named in honour of Pablo de La Llave, a Mexican naturalist.

Recent cladistic studies have shown that this genus forms a natural group with Cryptogramma and Coniogramme, a group that is sister to all the other pteridoid ferns.

[1][2] This group has been published as the Cryptogrammoideae, one of five subfamilies of the Pteridaceae.