Flora of North America species comparison

short-creeping to compact, 3–7 mm diam.;

scales uniformly brown or slightly darker at base, linear-lanceolate, straight to slightly contorted, loosely appressed, persistent.

short-creeping to compact, usually 4–8 mm diam.;

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

clustered, 6–50 cm;

vernation noncircinate.

clustered, 10–60 cm;

vernation noncircinate.

black, rounded adaxially.

dark brown, rounded adaxially.

lanceolate to linear-oblong, 2-pinnate to 2-pinnate-pinnatifid at base, 1–7 cm wide;

rachis rounded adaxially, lacking scales, with dimorphic pubescence, abaxially sparsely hirsute, adaxially covered with tortuous, appressed hairs.

linear, pinnate-pinnatifid throughout, 1–4 cm wide;

rachis rounded adaxially, lacking scales, with dense monomorphic pubescence.

narrowly elliptic to elongate-deltate, not beadlike, the largest 3–7 mm, abaxially and adaxially sparsely hirsute to glabrescent.

elongate-deltate to ovate, not especially beadlike, the largest 1–7 mm, abaxially densely tomentose, adaxially hirsute.

not articulate, dark color of stalk continuing into pinna base, basal pair slightly smaller than adjacent pair, ± equilateral, appearing glabrous or sparsely pubescent adaxially.

articulate at swollen, hirsute nodes, basal pair slightly smaller than adjacent pair, ± equilateral, appearing hirsute adaxially.

marginal to obscurely inframarginal, somewhat differentiated, 0.1–0.4 mm wide.

marginal, weakly differentiated, 0.05–0.25 mm wide.

± continuous around segment margins.

± continuous around segment margins.

containing 32 spores.

containing 32 spores.

green adaxially for most of length;

abaxial scales absent.

absent.

= 2n = 87, apogamous.

= 2n = 90, apogamous.