A New Species of Lindsaea (lindsaeaceae) from the Brazilian Amazon

A new species, Lindsaea pietrobomii (Lindsaeaceae), from the Brazilian Amazon is described and illustrated. It differs from the other simple-bladed species of the genus by having the base of the leaf blades obtuse when juvenile and cuneate when mature (never with sinus), the blades flabellate, and the costa up to one-fifth the blade length. An identification key for the simple-bladed species of Lindsaea is also provided.