Flora of North America species comparison

long-creeping, 1.5–3 mm diam.

usually long-creeping, 1.5–2.5 mm diam.

monomorphic, dying back in winter, often 1 cm or more apart, fertile leaves often somewhat longer than sterile leaves, 25–80 cm.

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

straw-colored above base, 12–45 cm × 1–3 mm, at base sparsely set with tan, ovate, glabrous scales.

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

lanceolate, 14–35 cm, proximal pinnae largest, or lowest pair slightly smaller, blade tapered gradually to pinnatifid apex.

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.

deeply pinnatifid to ca. 1 mm from costa, 3–10 × 1–2 cm;

segments oblong, somewhat oblique, entire;

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

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.

round, medial;

indusia tan, often glandular;

sporangia glabrous.

round, supramedial;

indusia tan, often ciliate;

sporangia glabrous.

abaxially of sparsely set hairs 0.2–0.4 mm primarily on costae, also of yellowish short-stalked glands less than 0.1 mm, blade tissue with numerous reddish to orangish, resinous, shiny, sessile, hemispheric glands;

blades adaxially with scattered hairs on veins.

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.

= 128.

= 54.