Flora of North America species comparison

compact, ascending, stout, 5–10 mm diam.;

scales mostly weakly bicolored, linear-subulate, 0.1–0.3 mm wide, centers dark brown, thin, margins lighter, thin, denticulate to entire.

compact, ascending, stout, 5–10 mm diam.;

scales bicolored, linear-subulate, 0.1–0.3 mm wide, centers black, thick, margins brown, thin, erose-dentate.

monomorphic, clustered on stem, 7–30 cm;

croziers nearly glabrous.

monomorphic, clustered on stem, 10–50 cm;

croziers sparsely to densely villous.

dark brown, lustrous, rounded adaxially, without prominent articulation lines.

black or dark purple, lustrous, rounded or slightly flattened adaxially, without prominent articulation lines.

linear, 1-pinnate, 1.5–4 cm wide;

rachis brown throughout, straight, rounded adaxially, glabrous.

linear to ovate, deeply pinnate-pinnatifid proximally, 2.5–8 cm wide;

rachis black or purple throughout, straight, often flattened adaxially, glabrous or villous.

broadly ovate to elliptic, 7–20 mm, leathery, glabrous;

margins plane, not recurved, not covering abaxial surface, borders whitish, entire;

apex obtuse to rounded.

linear-oblong, 10–40 mm, leathery, glabrous to sparsely villous abaxially on midrib;

margins recurved on fertile segments, rarely covering more than 1/2 abaxial surface, borders whitish, entire;

apex mucronate.

perpendicular to slightly ascending, usually not decurrent on rachis, simple and unlobed;

costae absent.

perpendicular to rachis or slightly ascending, not decurrent on rachis, ternate at base of leaf;

costae absent.

of ultimate segments obscure.

of ultimate segments obscure.

sessile or subsessile, containing 64 spores, intermixed with abundant farina-producing glands.

long-stalked, containing 64 spores, not intermixed with farina-producing glands.

= 58.