Flora of North America species comparison

creeping for 2–5 cm, then ascending or suberect, 1.5–3 mm diam.

creeping, 4–8 mm diam.

monomorphic, dying back in winter, tightly clustered, (25–)40–105 cm.

monomorphic, evergreen, (0.5–)1–3.5 cm apart, (30–)65–140 cm.

straw-colored, 3–20(–35) cm × 1–3 mm, at base with scales tan to reddish brown, ovate, glabrous.

straw-colored, 15–70 cm × 2–7(–9) mm, at base with scales tan to brownish, linear-lanceolate, hairy at margin.

elliptic, 20–70 cm, proximal 4–10 pinna pairs gradually reduced (smallest 5–20 mm), blade tapering gradually to pinnatifid apex.

30–70 cm, broadest at or near base, abruptly narrowed distally, apical pinna ± similar to lateral pinnae, 5–17 × 1–3(–5) cm.

3–10 × (0.6–)1–2 cm, deeply pinnatifid to within 1 mm of costa;

segments oblong to linear, oblique (sides slanted, not perpendicular to costa), entire to crenulate;

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

(4–)10–22(–28) × (0.3–)0.7–1.5 cm, incised 1/2–3/4 of width;

segments somewhat curved, margins revolute, those at base of proximal pinnae slightly elongate;

proximal pair of veins from adjacent segments running to sinus.

round, supramedial;

indusia tan, glabrous or short-ciliate, sometimes also with glands;

sporangia glabrous.

round, medial to supramedial;

indusia tan, bearing hairs 0.2–0.4 mm;

sporangia glabrous.

abaxially of sparsely set hairs 0.2–0.7 mm on rachises, costae, and sometimes veins, also of numerous orangish, sessile to usually short-stalked glands on blade tissue;

blades adaxially glabrous except along costae.

abaxially of hairs 0.2–0.4 mm on costae, veins, and blade tissue, also of brownish scales 0.6–1.2 mm on costae;

veins and blade tissue glabrous adaxially.

= 54.

= 144.