Flora of North America species comparison

monomorphic, dying back in winter, 35–120 × 15–40 cm.

dimorphic, 45–100 × 12–20 cm;

fertile leaves dying back in winter;

sterile leaves 1–several, smaller, green through winter.

1/3 length of leaf, scaly at base;

scales scattered, dark, glossy brown to nearly black, with pale border.

1/4–1/3 length of leaf, scaly at least at base;

scales scattered, tan, sometimes with dark brown center.

green, often white-mottled at tip, ovate, tapering abruptly at apex, pinnate-pinnatifid to 2-pinnate at base, herbaceous, not glandular.

green, lanceolate, with nearly parallel sides, pinnate-pinnatifid, herbaceous, not glandular.

parallel to plane of blade, ovate-lanceolate, broadest above base;

basal pinnae broadly oblong-lanceolate, slightly reduced, basal pinnule equal to adjacent pinnules, basal basiscopic pinnule and basal acroscopic pinnule equal;

pinnule margins crenulate or serrate.

of fertile leaves twisted out of plane of blade but not fully perpendicular to it, narrowly elongate-deltate;

basal pinnae narrowly elongate-deltate, much reduced;

basal pinnules longer than or equal to adjacent pinnules, basal basiscopic pinnule and basal acroscopic pinnule equal;

pinnule margins serrate or biserrate, with spiny teeth.

and axes lacking glands.

lacking glands.

nearer midvein than margin.

midway between midvein and margin of segments.

= 82.

= 246.