Flora of North America species comparison

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

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

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

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

round, supramedial;

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

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.

= 54.