Athyrium filix-femina var. asplenioides

(Michaux) Farwell

Pap. Michigan Acad. Sci. 2: 13. 1923.

Common names: Southern lady fern lowland lady fern
Endemic
Basionym: Nephrodium asplenioides (Michaux) Desvaux Fl. Bor.-Amer. 2: 268. 1803
Synonyms: Athyrium asplenioides Athyrium filix-femina subsp. asplenioides (Michaux) Hultén
Treatment appears in FNA Volume 2.

Petiole 13–55 cm; scales light-brown or brown, lanceolate, 6–9 × 2 mm, ± crisped. Blade ovatelanceolate to lanceolate, 2-pinnate-pinnatifid, (18–) 25–60 × (5–) 10–30 cm, slightly narrowed proximally, broadest just above base to just below middle, apex acuminate or ± caudate. Pinnae usually stalked, oblong-lanceolate to lanceolate, base truncate, apex acuminate. Pinnules oblong-lanceolate to narrowly deltate, base unequally cuneate, apex ± acute. Rachis, costae, and costules glabrous or with scales or pale glands. Sori elongate, straight or hooked at distal end or horseshoe-shaped; sporangial stalks with glandular-hairs; indusia ciliate, hairs glandular or nonglandular and ± as long as indusial width. Spores brown or dark-brown. 2n = 80.


Habitat: Moist woods, thickets, swamps
Elevation: 10–2000 m

Distribution

V2 282-distribution-map.gif

Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mass., Miss., Mo., N.J., N.Y., N.C., Okla., Pa., R.I., S.C., Tenn., Tex., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
Acute (?) +, Acuminate (?) +  and Caudate (?) +
Masahiro Kato +
(Michaux) Farwell +
black;dark redbrown +
persisting +
cuneate +
Nephrodium asplenioides +
simple to commonly +
18 cm180 mm <br />0.18 m <br /> (25 cm250 mm <br />0.25 m <br />) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
25 cm250 mm <br />0.25 m <br /> (?) +  and 60 cm600 mm <br />0.6 m <br /> (?) +
narrowed;2-pinnate-pinnatifid;ovatelanceolate;lanceolate +
reduced +
broadest;10cm;30cm +
roundish +
Southern lady fern +  and lowland lady fern +
Ala. +, Ark. +, Conn. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
10–2000 m +
often +  and glabrous +
Moist woods, thickets, swamps +
nonglandular +  and glandular +
ciliate +  and dentate +
monomorphic +
straw-colored +
0.5 times length of blade;0.5 times length of blade +
13 cm130 mm <br />0.13 m <br /> (55 cm550 mm <br />0.55 m <br />) +
oblong-lanceolate +  and narrowly deltate +
sessile +  and short-petiolulate +
Pap. Michigan Acad. Sci. +
with scales or pale glands +  and glabrous +
round +, cuplike +, hoodlike +, reniform +, falcate +  and linear +
brown;light-brown +
persistent +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
crisped;lanceolate +
crenate +  and serrulate +
straight +
persistent +
with narrow sinus +  and attached +
discrete +
horseshoe--shaped +, hooked +  and elongate +
dark-brown +  and brown +
reniform +  and oblong +
dictyostelic +, unbranched +  and branched +
ascending +  and short-creeping +
Athyrium asplenioides +  and Athyrium filix-femina subsp. asplenioides +
Athyrium filix-femina var. asplenioides +
Athyrium filix-femina +
variety +
epiphytic +  and hemiepiphytic +