A new species of Hemionitis (Pteridaceae) from central Brazil

Hemionitis umbrosa (Pteridaceae) is described from the state of Goias in central Brazil. It resembles H. tomentosa and was previously identified as such; however, it can be distinguished by having rhizome scales serrulate and spores cristate-reticulate. In contrast, H. tomentosa has rhizome scales entire or rarely sparsely denticulate and spores cristate. The new species is morphologically and anatomically described, illustrated, and a key is provided to the species of Hemionitis with free veins.