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*[http://plants.usda.gov/java/profile?symbol=DRCA11 USDA PLANTS Profile]
*[http://plants.usda.gov/java/profile?symbol=DRCA11 USDA PLANTS Profile]
*[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233500591 Dryopteris carthusiana] in ''[[Flora of North America]]''
*[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233500591 Dryopteris carthusiana] in ''[[Flora of North America]]''
*[http://www.andrew-leonard.co.uk/Scan/Dryopteris/Dryopteris%20carthusiana/Dryopteris%20carthusiana01.htm British Scanned Ferns: ''Dryopteris carthusiana'']


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Revision as of 18:18, 15 January 2011

Dryopteris carthusiana
Scientific classification
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Species:
D. carthusiana
Binomial name
Dryopteris carthusiana
Young sori on the frond underside.

Dryopteris carthusiana (Vill.) H.P. Fuchs (syn. D. spinulosa (O.F. Muell.) O. Kuntze) is a species of fern native to damp forests throughout the Holarctic Kingdom. It is known as the Narrow buckler fern in the United Kingdom, and as the Spinulose wood fern in North America.

It is a tetraploid of hybrid origin, one parent being Dryopteris intermedia, known in North America as the intermediate wood fern, and an unknown, apparently extinct species dubbed Dryopteris semicristata, which is also the presumed parent of the hybrid-origin Dryopteris cristata.

This fern is often confused with several other wood fern species, including D. intermedia, D. campyloptera, and D. expansa. It especially extensively shares the range of D. intermedia, but the two may be distinguished by the innermost pinnule on the bottom side of the bottom pinna: this pinnule is longer than the adjacent pinnules in D. carthusiana, but shorter or even in D. intermedia. D. carthusiana is a sub-evergreen species, its fronds surviving mild winters but dying back in harsh winters.

A nature print of Dryopteris carthusiana

References