Abstract
We present the taxonomic treatment of the Xyridaceae family for the state of Paraná. It is represented exclusively by the genus Xyris, with 22 species typical of grasslands. Three new records are reported for the state: Xyris glandacea, X. metallica and X. uninervis, all of them extends its distribution area to southern Brazil. Other novelties are a new synonym (Xyris simulans var. subtortula under Xyris asperula) and the reestablishment of Xyris dusenii. An identification key, descriptions, comments, illustrations and data on the geographical distribution of the species are provided.
Key words:
Southern grasslands; Poales; taxonomy
