Flora of North America species comparison

usually long-creeping, 3–6 mm diam.

short-creeping, 4–6 mm diam.

monomorphic, evergreen, (0.5–)1–4 cm apart, (30–)55–135(–165) cm.

often somewhat dimorphic, evergreen, often closely placed, 50–150 cm, fertile leaves with longer petioles and more contracted pinnae.

straw-colored, 15–80 cm × 2–6 mm, at base with tan to brownish, linear-lanceolate, hairy scales.

often purplish brown, 15–50 cm × 3–6 mm, at base with brown, linear-lanceolate, hairy scales.

about equaling petiole length, broadest at base, gradually to somewhat abruptly tapered to pinnatifid apex.

(25–)40–100 cm, 1–4(–6) proximal pairs of pinnae reduced, blade gradually tapered to pinnatifid apex.

(5–)10–25 × 0.8–2.2 cm, incised 4/5 of width;

segments oblique, somewhat curved, basal pair from middle pinnae often elongate parallel to rachis;

proximal pair of veins from adjacent segments reaching margin at or just above sinus.

7–17 × 1–3 cm, incised 1/2–3/4 of width;

segments rounded at apex, basal acroscopic segment of proximal pinnae often auriculate;

proximal pair of veins from adjacent segments united at obtuse angle below sinus with excurrent vein 2–4 mm.

round, supramedial to inframarginal;

indusia tan, hairy, hairs mostly 0.2–0.4 mm;

sporangia glabrous.

round, medial to supramedial;

indusia tan, pubescent, hairs 0.1–0.3 mm;

sporangial stalks with orangish, stalked glands.

abaxially of hairs mostly 0.2–0.5 mm on costae, veins, and blade tissue, also sometimes of a few tan scales on costae and rachises;

blades adaxially glabrous except along rachises and costae.

abaxially of uniformly short hairs 0.1–0.2 mm on costae, veins, and blade tissue;

veins adaxially with stouter hairs, also with hairs 0.1–0.2 mm on blade tissue.

= 72.

= 144.