© Avelino Vieira
Description: Perennial herbaceous plant with short rhizome. The fronds are laid in a dense tuff, with short petioles, dark brown, brilliant and hairless. The blade is linear-oblong, pinnate. The sori are small and linear.
Habitat: Cracks in the rocks, walls and mortared walls, and sometimes in the woods.
Where to find in the Arouca Geopark: Espiunca (PR10); S. Pedro Velho (G3); Serabigões (PR10); Póvoa (PR3); Póvoa Reguenga (PR 2); Povos (PR 4).