Gymnocarpium dryopteris

Gymnocarpium dryopteris
Conservation status
Secure (NatureServe)
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	Polypodiopsida/Pteridopsida (disputed)
Order:	Polypodiales
(unranked):	Eupolypods II
Family:	Cystopteridaceae
Genus:	Gymnocarpium
Species:	G. dryopteris
Binomial name
Gymnocarpium dryopteris (L.) Newman
Synonyms
Synonymy Dryopteris dryopteris (L.) Britton Dryopteris disjuncta (Rupr.) C.V.Morton Dryopteris linnaeana C. Chr. Lastrea dryopteris (L.) Bory Phegopteris dryopteris (L.) Fée Thelypteris dryopteris (L.) Sloss. Aspidium dryopteris Baumg. Carpogymnia dryopteris (L.) Á. Löve & D. Löve Currania dryopteris (L.) Wherry Dryopteris pulchella (Salisb.) Hayek Dryopteris pumila V.I. Krecz. Filix pumila Gilib. Nephrodium dryopteris (L.) Michx. Polypodium dryopteris L. Polypodium pulchellum Salisb.

Gymnocarpium dryopteris (western oakfern, common oak fern, oak fern or northern oak fern) is a fern of the family Cystopteridaceae. It is widespread across much of North America and Eurasia. It has been found in Canada, the United States, Greenland, China, Japan, Korea, Russia, and most of Europe.

Gymnocarpium dryopteris has small, delicate fronds up to 40 cm (16 inches) long, with ternately-compound pinnae (leaves). Fronds occur singly. On the underside of matured pinnae with naked sori can be found. The species grows in coniferous woodlands and on shale talus slopes.

Gymnocarpium dryopteris, a forest understory plant, is not found in association with Quercus (oak).

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Wikipedia