Flora of North America species comparison

short-creeping, 4–6 mm diam.

erect, (3–)5–12 mm diam.

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

monomorphic, evergreen, clustered, (15–)25–100(–135) cm;

croziers often mucilaginous.

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

straw-colored, 2–15(–25) cm × 1–4(–6) mm, at base with brownish, ovate-lanceolate, ± glabrous scales.

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

to 110 cm, proximally with 6–12 pairs of smaller pinnae, distally tapering gradually to a 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.

round, medial to supramedial;

indusia tan, pubescent, hairs 0.1–0.3 mm;

sporangial stalks with orangish, stalked glands.

round, medial to submarginal;

indusia tan, glandular, and sparsely hairy.

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 0.2–0.5 mm on rachises, costae, and sometimes veins and blade tissue, also of numerous glands, these yellowish to often reddish, resinous, shiny, sessile, hemispheric;

blade tissue adaxially glabrous or sparsely hairy.

pinnae hastate or auriculate;

longest (medial) pinnae 2–14(–20) × 0.4–2.5 cm, incised to within 1 mm of costa;

segments 2–3 mm wide, strongly oblique and somewhat curved;

veins meeting margin above sinus.

= 144.

= 58.