Dryopteris crinalis

Dryopteris crinalis is a species of fern known as the serpent woodfern. It is endemic to Hawaii, where it is known from the main islands.^[1]

Dryopteris crinalis
Conservation status
Vulnerable  (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Polypodiineae
Family:	Dryopteridaceae
Genus:	Dryopteris
Species:	D. crinalis
Binomial name
Dryopteris crinalis (Hook. & Arn.) C.Chr.

There are at least two varieties. The var. podosorus was federally listed as an endangered species of the United States in 2010.^[2] There are three populations on Kauai, for a total of no more than 47 individual plants. The fern grows on walls of basalt in wet forests.^[2] Fronds grow up to 3 ft (0.91 m) long.^[3]