Pityrogramma calomelanos

Pityrogramma calomelanos^[2][3], commonly known as the silver fern^[4], is a rhizomatous geophyte or lithophyte native to Mexico and Tropical America^[5][6][7]. It grows mainly in subtropical regions and has been introduced widely across Asia, Africa, and Pacific islands^[8].

Pityrogramma calomelanos
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Family:	Pteridaceae
Genus:	Pityrogramma
Species:	P. calomelanos
Binomial name
Pityrogramma calomelanos (L.) Link[1]