Flora of North America species comparison

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.

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

scales uniformly reddish brown, linear-subulate, 0.1–0.3 mm wide, thin, margins sinuous, nearly entire.

monomorphic, clustered on stem, 10–50 cm;

croziers sparsely to densely villous.

monomorphic, clustered on stem, 2.5–20 cm;

croziers sparsely villous.

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

brown, lustrous, rounded adaxially, with prominent articulation lines near base.

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

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

linear-oblong, pinnate-pinnatifid proximally, 1–4 cm wide;

rachis brown proximally, green distally, straight, rounded adaxially, glabrous to sparsely villous.

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.

lanceolate-deltate, 5–25 mm, herbaceous, glabrous;

margins recurved on fertile segments, covering less than 1/2 abaxial surface, borders whitish, erose-denticulate;

apex obtuse or rounded.

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

costae absent.

ascending or perpendicular to rachis, decurrent on rachis, deeply 2-lobed (mitten-shaped) near base of leaf;

costae absent.

of ultimate segments obscure.

of ultimate segments evident.

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

sessile or subsessile, containing 64 spores, not intermixed with farina-producing glands.

= 58.