Abstract The Parque Provincial Moconá is in the east of the Misiones province, surrounded by Yabotí and Uruguay rivers. It belongs to Yabotí Biosphere Reserve, and together with other Biosphere’s protected areas, it represents one of the main relicts of the Paranaense forest in the country. In this work, fern and lycophyte species that grow in the park were exhaustively surveyed. Field trips were carried out to the study area and national herbaria were consulted. Seventy-one taxa were found, 38 of which represent new records for the protected area. A comprehensive key to the species and habitat considerations are provided. Additionally, the relationship with the adjacent protected area Parque Estadual do Turvo, Rio Grande do Sul (Brazil) and the relevance to the conservation of native flora is discussed.
biodiversity; Paranaense; Biosphere Reserves; Uruguay River