Flora of North America species comparison

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

scales often uniformly brown but at least some on each plant with thin, poorly defined, dark, central stripe, linear-lanceolate, straight to slightly contorted, loosely appressed, persistent.

compact, 4–8 mm diam.;

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

clustered, 7–50 cm;

vernation circinate.

clustered, 7–30 cm;

vernation noncircinate.

dark brown, rounded adaxially.

usually dark brown, rounded adaxially.

linear-oblong to lanceolate, usually 2-pinnate-pinnatifid at base, 1.5–5 cm wide;

rachis rounded adaxially, lacking scales, with monomorphic pubescence.

oblong-lanceolate to ovate, 3–4-pinnate at base, 1.5–5 cm wide;

rachis rounded adaxially, with scattered filiform to lanceolate scales, not pubescent.

oblong to lanceolate, not beadlike, the largest 3–5 mm, abaxially and adaxially sparsely hirsute with long, segmented hairs.

round to oval, beadlike, the largest 1–2 mm, abaxially nearly glabrous except for a few coarse hairs, adaxially villous with coarse, unbranched hairs.

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

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

marginal, weakly differentiated, 0.05–0.25 mm wide.

marginal to obscurely inframarginal, slightly differentiated, 0.05–0.25 mm wide.

discontinuous, concentrated on small apical and lateral lobes.

± continuous around segment margins.

containing 64 spores.

containing 32 spores.

brown adaxially for most of length;

abaxial scales absent.

green adaxially for most of length;

abaxial scales multiseriate, ovate to lanceolate, shallowly cordate at base, often with overlapping basal lobes, conspicuous, the largest 0.4–1.5 mm wide, strongly imbricate, often concealing ultimate segments, erose-dentate, not ciliate.

= 2n = 90, apogamous.

= 60.