Flora of North America species comparison

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

usually long-creeping, 3–6 mm diam.

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

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

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

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

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

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

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.

(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, supramedial;

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

sporangia glabrous.

round, supramedial to inframarginal;

indusia tan, hairy, hairs mostly 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 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.

= 54.

= 72.