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D. lacera resources
Flora of JapanFlora of Japan
frond, crosiersfrond, crosiers
habit, frond, fertile portionhabit, frond, fertile portion
in habitat, stipe and rachis scalesin habitat, stipe and rachis scales
mature and senescent stages of the frond, sorimature and senescent stages of the frond, sori
ratty frond, withered fertile pinnae, compared to D. uniformisratty frond, withered fertile pinnae, compared to D. uniformis
inoperativetop of fertile frond (link inoperative)
upper and lower surfaces of fertile frondupper and lower surfaces of fertile frond

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     aemula  affinis
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     expansa  filix-mas
     formosana  fragrans
     fuscipes  goldiana
     hondoensis  intermedia
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    Oreopteris  Osmunda
    Pellaea  Phegopteris
    Pleopeltis  Polypodium
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    Thelypteris  Woodsia
Dryopteris lacera (Thunb.) Kunze
Etymology Latin: lacera, torn into fringelike segments
Description Rhizome: erect, massive, bearing several fronds in a tuft, scaly.
Frond: 60 cm high by 20 cm wide, evergreen, somewhat dimorphic, fertile fronds with more and constricted pinnae at the , blade/stipe ratio: 3:1.
Stipe: grooved, densely scaly throughout, brown to reddish brown, oblong-ovate to linear-lanceolate, larger ones to 2 cm long, membranous, vascular bundles: 3-7 in a C-shaped pattern.
Blade: pinnate-pinnatifid to nearly 2-pinnate, oblong to ovate-oblong, herbaceous to somewhat leathery, linear to ovate scales below, absent above.
Pinnae: 10 to 20 pair, lower sterile pinnae oblong-lanceolate, shortly stalked; fertile pinnae confined to upper portion, gradually smaller upwardly, covered entirely by sori, withering after maturation,; veins immersed on upper surfaces, distinct.
Sori: round, entirely covering the fertile pinnae, indusium: reniform, sporangia: brownish.
Culture Habitat: floor of mountain forests, at edge of lowland forests. Distribution: Japan, China, Korea. Hardy to -25C, USDA Zone 5.
Polypodium lacerum Thunb.
Aspidium filix-mas var. lacerum Chr.
Aspidium lacerum (Thunb.) Sw.
Lastrea lacera (Thunb.) D.C. Eaton
Nephrodium lacerum (Thunb.) Baker
Polypodium lacerum Thunb.
Polystichum lacerum Presl
Dryopteris lacera
Dryopteris lacera.  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.
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