This research included a review of the literature, study of hebarium specimens, collection and observation of populations in the field. Taxonomic decisions were based on external morphology, and resulted in the recognition of fourteen taxa, eleven species and three varieties. Analytical keys for species and varietes, descriptions, illustrations and data on their geographical distribution, habitat and phenology are provided.
Floristic; Cyperaceae; Cyperus subg. Anosporum; Rio Grande do Sul; Brazil