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 well-defined, dark, central stripe, linear-lanceolate, slightly contorted, loosely appressed, persistent.

short-creeping, usually 4–8 mm diam.;

scales uniformly dark brown or with poorly defined, dark, central stripe, narrowly lanceolate, straight to slightly contorted, loosely appressed, usually persistent.

clustered, 4–20 cm;

vernation circinate.

clustered, 8–25 cm;

vernation circinate.

dark brown to black, rounded adaxially.

dark brown, grooved most of length adaxially.

linear-oblong to lanceolate, 3-pinnate at base, 1–3 cm wide;

rachis rounded adaxially, lacking scales, with dense monomorphic pubescence.

elongate-pentagonal, 3-pinnate-pinnatifid to 4-pinnate at base, 4–10 cm wide;

rachis grooved adaxially, lacking scales, with minute, widely scattered hairs.

round to slightly oblong, beadlike, the largest 1–3 mm, abaxially densely villous with long, segmented hairs, adaxially sparsely hirsute to glabrescent.

elliptic to linear-oblong, not beadlike, the largest 4–10 mm, abaxially with reddish, scattered, sessile glands, adaxially glabrous;

false indusia marginal to obscurely inframarginal, strongly differentiated, 0.25–0.50 mm wide.

not articulate, dark color of stalk continuing into pinna base, basal pair usually smaller than adjacent pair, ± equilateral, appearing sparsely pubescent to glabrescent adaxially.

not articulate, dark color of stalk continuing into pinna base, basal pair conspicuously larger than adjacent pair, inequilateral, proximal basiscopic pinnules enlarged, glabrous adaxially.

marginal, weakly differentiated, 0.05–0.20 mm wide.

± continuous around segment margins.

± continuous around segment margins.

containing 32 spores.

containing 32 spores.

brown adaxially for most of length;

abaxial scales absent.

green adaxially for most of length;

abaxial scales absent.

= 2n = 90, apogamous.

= 2n = 90, apogamous.