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 uniformly reddish brown (or tan), linear-subulate, 0.1–0.3 mm wide, thin, margins entire to denticulate.

monomorphic, clustered on stem, 7–30 cm;

croziers nearly glabrous.

somewhat dimorphic, sterile leaves shorter and less divided than fertile leaves, clustered on stems, 5–50 cm;

croziers villous.

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

reddish purple to nearly black, lustrous, rounded adaxially, without prominent articulation lines.

linear, 1-pinnate, 1.5–4 cm wide;

rachis brown throughout, straight, rounded adaxially, glabrous.

elongate-deltate, usually 2-pinnate proximally, 2–18 cm wide;

rachis reddish purple throughout, straight, rounded adaxially, densely pubescent adaxially with short, curly, appressed hairs.

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, 10–75 mm, leathery, sparsely villous abaxially near midrib;

margins weakly recurved to plane on fertile segments, usually covering less than 1/2 abaxial surface, borders whitish, crenulate;

apex obtuse to slightly mucronate.

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

costae absent.

perpendicular to rachis or ascending, not decurrent on rachis, usually with 3–15 ultimate segments;

costae straight, 10–100 mm, often longer than ultimate segments.

of ultimate segments obscure.

of ultimate segments obscure.

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

long-stalked, containing 32 spores, not intermixed with farina-producing glands.

= 2n = 87, apogamous.

= 58.