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Despite the existence of important floristic and forest inventories in the Paraná state, the montane and upper montane ecosystems still give rise to new species and new records of plants. Here, we report for the first time in the Paraná state Hydrocotyle itatiaiensis Brade (Araliaceae), a rare and poorly studied species endemic to montane and upper montane rainforests and highland grasslands of the South and Southeast regions of Brazil. The previously known geographic distribution had a 700 km gap between northern São Paulo and southern Santa Catarina states, which is now filled by the present record. We provide photographs from the field, a map of occurrences, a description, and comments on the morphology, taxonomy, and conservation status of the species. Our new records reinforce the conservation importance of these environments and the need for further floristic sur-veys in the region.