Gymnocarpium dryopteris

Gymnocarpium dryopteris
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	Pteridopsida
Order:	Polypodiales
(unranked):	Eupolypods II
Family:	Cystopteridaceae
Genus:	Gymnocarpium
Species:	G. dryopteris
Binomial name
Gymnocarpium dryopteris (L.) Newman
Synonyms
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.

Gymnocarpium dryopteris (Western Oakfern, Common Oak Fern or Northern Oak Fern) is a fern of the family Polypodiaceae.

Description

Gymnocarpium dryopteris has small, delicate fronds with ternately-compound pinnae (leaves). Fronds occur singly. On the underside of matured pinnae naked sori can be found.

Distribution

Common in the Canadian forests and the Northwestern United States. It is also found in Scotland and Scandinavia, Finland, and Russia.^[1][2] Its name is debated also as gymnocarpium dysjunctum. Oakfern may be a translation of dryoteris.

This species, a forest understory plant, is not found in association with Quercus (oak).^[3][4]

References

1. ^ "Gymnocarpium dryopteris". WTU Herbarium Image Collection. Burke Museum, University of Washington. http://biology.burke.washington.edu/herbarium/imagecollection.php?Genus=Gymnocarpium&Species=dryopteris. Retrieved 2009-12-20. 
2. ^ "Gymnocarpium dryopteris (L.) Newman". PLANTS Profile. United States Department of Agriculture; Natural Resources Conservation Service. http://plants.usda.gov/java/profile?symbol=GYDR. Retrieved 2009-12-20. 
3. ^ Plants of the Pacific Northwest Coast: Washington, Oregon, British Columbia & Alaska, Written by Paul Alaback, ISBN 978-1-55105-530-5
4. ^ Pojar, Jim; Andy MacKinnon (1994). Plants of the Pacific Northwest. Lone Pine Publishing. p. 423. ISBN 1-55105-042-0. 

External links

Media related to Oak Fern at Wikimedia Commons