Blechnum L.

Castro-Aguiar, Pedro Henrique, Fernandes, Rozijane Santos & Zappi, Daniela Cristina, 2025, Ferns of the Parque Nacional das Nascentes do Rio Parnaíba Brazilian Cerrado, Rodriguesia (e 00612024) 76, pp. 1-24 : 8

2. Blechnum L.

Blechnum comprises around 25 species, the majority of these being Neotropical, with some species occurring in southern Africa ( Gasper et al. 2016). In Brazil, 15 species occur (Dittrich & Gasper 2023). In the area of study, two species were recorded, with both new records in the State of Maranhão. Within these species, Blechnum areolatum V.A.O. Dittrich & Salino is highlighted as a new occurrence for the Brazilian Cerrado.

Key for the species of Blechnum in the PNNRP, Brazil

1. Veins partially anastomosing; lamina 1-pinnate, not narrowed at the base; 1–2 pairs of pinnae .............. ................................................................................................................................. 2.1. Blechnum areolatum

1’. Veins free; lamina pinnatisect, gradually narrowed towards the base, forming semicircular lobes; 5–21 pairs of pinnae ............................................................................................................ 2.2. Blechnum asplenioides