$modus 0: smartphone
$modus 1: smartphone
Cystopteris tenuis
Cystopteris tenuis (Michx.) Desv. [Accepted]
Dryopteridaceae Athyrioideae Physematieae
2 315817 Cystopteris tenuis (Michx.) Desv. [80 699229 Nephrodium tenue Michx.]
E.J. Lowe, Ferns, vol. 7 : p. 85, t. 35 (1839)