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|genus=Gymnocarpium
|genus=Gymnocarpium
|species=dryopteris
|species=dryopteris
|common_name= Common oak fern
|common_name=Common oak fern
|name_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|name_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|habit=fern
|habit=fern
|Max wd metric=in
|Max wd metric=in
|width_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|width_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|lifespan=perennial
|exposure=shade
|exposure=shade
|sun_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|sun_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|features=ground cover
|features=foliage, ground cover
|Temp Metric=°F
|Temp Metric=°F
|min_zone=2
|min_zone=2
|usda_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|usda_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|max_zone=9
|max_zone=9
|image=Upload.png
|image=Gymnocarpium dryopteris AT.JPG
|image_width=240
|image_width=240
}}
}}
'''''Gymnocarpium dryopteris''''' ('''Western Oakfern''', '''Common Oak Fern''' or '''Northern Oak Fern''') is a fern of the family [[Polypodiaceae]]. It has small, delicate fronds with ternately-compound pinnae (leaves). Fronds occur singly. On the underside of matured pinnae naked sori can be found. Common in the [[Canada|Canadian]] forests, it is also found in [[Scotland]] and [[Scandinavia]] as well as North Western United States.<ref name="Burke">{{cite web|title=Gymnocarpium dryopteris|work=WTU Herbarium Image Collection |publisher=Burke Museum, University of Washington|url=http://biology.burke.washington.edu/herbarium/imagecollection.php?Genus=Gymnocarpium&Species=dryopteris|accessdate= 2009-12-20}}</ref><ref name="PLANTS">{{cite web | title = Gymnocarpium dryopteris (L.) Newman | work = PLANTS Profile | publisher = United States Department of Agriculture; Natural Resources Conservation Service | url = http://plants.usda.gov/java/profile?symbol=GYDR | accessdate = 2009-12-20 }}</ref> 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).<ref>Plants of the Pacific Northwest Coast: Washington, Oregon, British Columbia & Alaska, Written by Paul Alaback, ISBN 978-1-55105-530-5</ref><ref name="Pojar">{{cite book | last = Pojar | first = Jim | coauthors = Andy MacKinnon | title = Plants of the Pacific Northwest | publisher = Lone Pine Publishing | page = 423 | date = 1994 | id = ISBN 1-55105-042-0}}</ref>
==Cultivation==
==Cultivation==