Flora of North America species comparison

short-creeping, usually 3–7 mm diam.;

scales usually bicolored, with broad, well-defined, dark, central stripe and narrow, light brown margins, linear-lanceolate, straight to slightly contorted, strongly appressed, persistent.

short-creeping, usually 4–8 mm diam.;

scales uniformly dark brown or with poorly defined, dark, central stripe, narrowly lanceolate, straight to slightly contorted, loosely appressed, usually persistent.

clustered, 4–25 cm;

vernation noncircinate.

clustered, 8–25 cm;

vernation circinate.

dark brown, rounded adaxially.

dark brown, grooved most of length adaxially.

lanceolate to ovate-deltate, usually 3-pinnate at base, 1–4 cm wide;

rachis rounded adaxially, with scattered scales and sparse monomorphic pubescence.

elongate-pentagonal, 3-pinnate-pinnatifid to 4-pinnate at base, 4–10 cm wide;

rachis grooved adaxially, lacking scales, with minute, widely scattered hairs.

oblong to ovate, beadlike, the largest 1–3 mm, abaxially densely covered with branched hairs and small, ciliate scales, adaxially with scattered branched hairs or glabrescent.

elliptic to linear-oblong, not beadlike, the largest 4–10 mm, abaxially with reddish, scattered, sessile glands, adaxially glabrous;

false indusia marginal to obscurely inframarginal, strongly differentiated, 0.25–0.50 mm wide.

not articulate, dark color of stalk continuing into pinna base, basal pair not conspicuously larger than adjacent pair, usually equilateral, appearing glabrous to sparsely pubescent adaxially.

not articulate, dark color of stalk continuing into pinna base, basal pair conspicuously larger than adjacent pair, inequilateral, proximal basiscopic pinnules enlarged, glabrous adaxially.

marginal, weakly differentiated, 0.05–0.25 mm wide.

± continuous around segment margins.

± continuous around segment margins.

containing 64 spores.

containing 32 spores.

green adaxially for most of length;

abaxial scales multiseriate, ovate-lanceolate, deeply cordate at base, with overlapping basal lobes, conspicuous, the longest 0.4–1 mm wide, imbricate, often concealing ultimate segments, long-ciliate, cilia usually confined to proximal 1/2.

green adaxially for most of length;

abaxial scales absent.

= 2n = 90, apogamous.