Flora of North America species comparison

usually long-creeping, 1.5–2.5 mm diam.

short- to long-creeping, 4–8 mm diam.

monomorphic, dying back in winter, mostly evenly spaced 1 cm or more (sun-gathering leaves in loose cluster), (25–)40–85 cm.

monomorphic, evergreen, up to 2(–3) cm apart, (15–)50–160 cm.

straw-colored, 4–25 cm × 1–3 mm, at base with scales tan to reddish brown, ovate, glabrous.

straw-colored, (5–)20–80 × (1–)3–6 mm, at base with brown, linear-lanceolate, hairy scales.

elliptic, 15–60 cm, proximal 4–10 pinna pairs gradually smaller toward base (smallest often less than 5 mm), blade tapering gradually to pinnatifid apex.

(9–)30–80 cm, broadest at base, gradually tapered to pinnatifid apex.

deeply pinnatifid to within 1 mm of costa, 3–9(–13) × 1–2(–2.5) cm;

segments oblong to linear, somewhat oblique, entire to crenulate;

proximal pair of veins from adjacent segments meeting margin above sinus.

(2–)8–15(–20) × (0.6–)1–2.5 cm, incised 3/5–4/5 of width;

segments oblong, rounded to acute at apex;

proximal pair of veins from adjacent segments running to sinus, or nearly so.

round, supramedial;

indusia tan, often ciliate;

sporangia glabrous.

round, medial to supramedial;

indusia tan, hairy, hairs 0.2–0.4 mm;

sporangial glands obscure, yellowish, stalked, arising from sporangial stalks.

abaxially of moderately to densely set hairs to 1 mm on rachises, costae, and veins, glands lacking or yellowish to light orangish, mostly sessile on blade tissue;

blades adaxially often with hairs on veins.

abaxially of hairs mostly 0.3–1 mm on costae, veins, and blade tissue;

veins adaxially with similar hairs but blade tissue usually without hairs, often with scattered yellowish, stalked glands 0.1 mm.

= 54.

= 144.