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D. clintoniana resources
Descriptive
Connecticut Botanical SocietyConnecticut Botanical Society
Distribution
North AmericaNorth America
WorldWorld
Drawing
Britton & BrownBritton & Brown
Flora
Flora of North AmericaFlora of North America
Herbarium
inoperativeNYBG, pinna only (link inoperative)
Monograph
Hoshizaki and WilsonHoshizaki and Wilson

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     clintoniana  crassirhizoma
     cristata  cycadina
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    Thelypteris  Woodsia
    Woodwardia
 
Dryopteris clintoniana (D. C. Eaton) Dowell

Clinton's wood fern

Etymology Named for Judge G.W. Clinton (1807-1885), a well known naturalist of Buffalo, New York.
Description Rhizome: short-creeping.
Frond: 120 cm high by 20 cm wide, fertile fronds deciduous, sterile evergreen, somewhat dimorphic, fertile (1-several) smaller, blade/stipe ratio: 2:1 to 3:1.
Stipe: grooved, green, dark brown at base, scales scattered, tan, vascular bundles: 5 in a c-shaped pattern.
Blade: 1-pinnate-pinnatifid, almost more, lanceolate with nearly parallel sides, tapering only in the upper , herbaceous, linear to ovate scales below, absent above.
Pinnae: 14 to 16 pair, above the basal pair, more alternate than opposite; costae grooved above, continuous from rachis to costae; margins serrate, minutely spiny; veins free, forked.
Sori: round, on veins, closer to the costa than the margin, indusium: reniform, at a sinus, sporangia: brownish, maturity: midsummer.
Culture Habitat: swampy woods. Distribution: ne North America. Hardy to -35C, USDA Zone 3.
Synonyms
Dryopteris cristata (L.) Gray var. clintoniana (D.C. Eat.) Underwood
Dryopteris poyseri Wherry
Aspidium cristatum (L.) Swartz var. clintonianum D. C. Eaton
Thelypteris clintoniana House
Dryopteris claytoniana, invalid
Dryopteris clintoniana
Dryopteris clintoniana.  Illustration from The Cultivated Species of the Fern Genus Dryopteris in the United States, Barbara Joe Hoshizaki and Kenneth A. Wilson, American Fern Journal, 89, 1, (1999), with permission.
Dryopteris clintoniana
Dryopteris clintoniana. Five vascular bundles at both the base and the top of the stipe.  Drawing from Ferns of Northeastern United States, Farida A. Wiley, 1936.
Dryopteris clintoniana
Dryopteris clintoniana. a) frond, to 80 cm, long and broad (20 cm) but often great variation on the same plant; b) fertile pinnules, not quite 2-pinnate.  Illustration by V. Fulford from Ferns and Fern Allies of Canada, William J. Cody and Donald M. Britton, 1989, Agriculture Canada, used with permission.
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