Connecticut Botanical Society| Dryopteris campyloptera | ||
Mountain wood fern | ||
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Etymology
Latin: campylo means curved + ptera, from the Greek pteron meaning wing
Description
Rhizome: erect.
Frond: 60 cm high by 25 cm wide, deciduous, monomorphic, blade/stipe ratio: 2:1. Stipe: grooved, green, light-brown scales at the base, vascular bundles: 5 in a c-shaped pattern. Blade: 3-pinnate-pinnatifid, deltate-ovate, herbaceous, linear to ovate scales below, extending to costa, absent above. Pinnae: anadromous, in plane of blade, lanceolate; basal pinnae deltate to broadly lanceolate, not reduced; pinnules basiscopic pinnule of lowest pinnae very long, basal pinnules equal to adjacent pinnules, basal basiscopic pinnule much longer and 2 times width of acroscopic one; costae grooved above, continuous from rachis to costae; margins margins toothed, teeth spine-tipped.; veins free, forked. Sori: round, in 1 row between midrib and margin, indusium: reniform, at a sinus, sporangia: brownish, maturity: midsummer. Culture
Habitat: cool, moist woods at increasing elevation southward.
Distribution: eastern North America.
Hardy to -30°C, USDA Zone 4.
Synonyms
Aspidium campylopterum Kunze Dryopteris austriaca (Jacquin) Schinz & Thellung Dryopteris dilatata ssp. americana (Fisch.) Hulten Dryopteris spinulosa (Swartz) Watt var. americana (Fischer ex Kunze) Fernald Dryopteris spinulosa var. concordiana (Davenport) Eastman |
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Notes
Spinulose woodferns Pinnae in plane of blade, lanceolate; basal pinnae deltate to broadly lanceolate, not reduced, basal pinnules equal to adjacent pinnules, basal basiscopic pinnule much longer and 2 times width of basal acroscopic pinnule (only in this species)
Spinulose woodferns Pinnae in plane of blade, lanceolate; basal pinnae deltate to broadly lanceolate, not reduced, basal pinnules equal to adjacent pinnules, basal basiscopic pinnule much longer and 2 times width of basal acroscopic pinnule (only in this species)
Dryopteris campyloptera. Five vascular bundles at both the base (below) and the top of the stipe. The groove on the upper surface of the stipe becomes more pronounced as one moves up. Drawing from Ferns of Northeastern United States, Farida A. Wiley, 1936. |
Dryopteris campyloptera. lowest pinna, tripinnate at base, strongly anadromic, scales extend to costa. Illustration by V. Fulford from Ferns and Fern Allies of Canada, William J. Cody and Donald M. Britton, 1989, © Agriculture Canada, used with permission. |
