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FNA | Family List | FNA Vol. 2 | Dryopteridaceae | Athyrium

2d. Athyrium filix-femina var. asplenioides (Michaux) Farwell, Pap. Michigan Acad. Sci. 2: 13. 1923.

Southern lady fern, lowland lady fern

Nephrodium asplenioides Michaux, Fl. Bor.-Amer. 2: 268. 1803; Athyrium asplenioides (Michaux) Desvaux; A. filix-femina subsp. asplenioides (Michaux) Hultén

Petiole 13--55 cm; scales light brown or brown, lanceolate, 6--9 × 2 mm, ± crisped. Blade ovate-lanceolate 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. 2 n = 80.

Moist woods, thickets, swamps; 10--2000 m; 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.


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