Flora of North America species comparison

short-creeping, 4–6 mm diam.

usually long-creeping, 3–6 mm diam.

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

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

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

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

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

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

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.

(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.

round, medial to supramedial;

indusia tan, pubescent, hairs 0.1–0.3 mm;

sporangial stalks with orangish, stalked glands.

round, supramedial to inframarginal;

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

sporangia glabrous.

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.

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.

= 144.

= 72.