Athyrium filix-femina var. asplenioides
Pap. Michigan Acad. Sci. 2: 13. 1923.
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. 2n = 80.
Habitat: Moist woods, thickets, swamps
Elevation: 10–2000 m
Distribution
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.