Flora of North America species comparison

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

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

creeping, horizontal, slender, 2–5 mm diam.;

scales mostly bicolored, lanceolate, largest scales 0.3–0.8 mm wide, centers black, thick, margins brown, thin, erose-dentate.

monomorphic, clustered on stem, 8–40 cm;

croziers sparsely villous.

monomorphic, clustered or scattered along stem, 15–100 cm;

croziers pubescent, bearing a few scales.

dark brown, lustrous, flattened or slightly grooved adaxially, without prominent articulation lines.

straw-colored, tan, or gray, not lustrous, rounded or slightly flattened adaxially, without prominent articulation lines.

linear-oblong, 2-pinnate proximally, 1–4 cm wide;

rachis brown throughout, straight, shallowly grooved adaxially, usually glabrous.

elongate-deltate, usually 3-pinnate proximally, 5–25 cm wide;

rachis tan throughout, strongly flexuous, rounded or flattened adaxially, usually glabrous.

linear, 5–20 mm, leathery, glabrous;

margins on fertile segments strongly revolute, covering more than 1/2 abaxial surface, borders greenish, crenate;

apex mucronate.

lanceolate-deltate, 5–20 mm, leathery, glabrous or sparsely pubescent;

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

apex obtuse to truncate.

strongly ascending, not decurrent on rachis, usually with 5–11 ultimate segments;

costae straight, 5–20 mm, usually shorter than ultimate segments.

retrorse, projecting downward toward base of leaf, not decurrent on rachis, with 5–40 ultimate segments;

costae strongly flexuous, 25–120 mm, longer than ultimate segments.

of ultimate segments obscure.

of ultimate segments obscure.

short-stalked, containing 64 spores, intermixed with abundant farina-producing glands.

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

= 58.