From the Greek, pseudo, false, + the reference to the male fern, D. filix-mas.
Rhizome: erect, stout, branching.
Frond: 100 cm high by 25 cm wide, deciduous in colder areas, monomorphic, blade/stipe ratio: 3:1.
Stipe: grooved, densely scaly, triangular to ovate, to 15 mm, brown, darker at the base and center, vascular bundles: 3-7 in a c-shaped pattern.
Blade: 1-pinnate-pinnatifid to 2-pinnate at base, or more with older specimen, oblanceolate, herbaceous to somewhat leathery, linear to ovate scales below, absent above.
; costae grooved above, continuous from rachis to costaeMargins shallowly serrate or toothed; veins free, forked.
Sori: round, in 1 row between midrib and margin, indusium: reniform, shriveling upon ripening, at a sinus, sporangia: brownish.
Habitat: moist forests, high elevation.
Distribution: Mexico, Guatemala.
Hardy to -25°C, USDA Zone 5.
Aspidium pseudofilix-mas Fée
Lastrea chrysocarpa Moore
Dryopteris chrysocarpa (Fée) Rothm.
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.