Flora of North America species comparison

long-creeping, cordlike, 3–6 mm diam.

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

monomorphic, evergreen, 3–6 cm apart, 50–150(–250) cm.

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

straw-colored to tan, 20–125 cm × 3–6 mm, scaleless.

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

30–125 cm, broadest at base, gradually narrowed distally to pinnatifid apex.

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

7–30 × 1–2 cm, incised 1/3–1/2(–3/5) of width;

segments deltate, rounded to acute;

proximal pair of veins from adjacent segments united at acute or obtuse angle below sinus, with excurrent vein 2–4 mm.

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, medial to supramedial;

indusia tan, glabrous to hairy;

sporangia with red- or orange-capped, stalked, globose glands arising from sporangial stalks.

round, supramedial;

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

sporangia glabrous.

abaxially of hairs 0.1–0.3 mm on costae and veins, or hairs often lacking, costae also with tan, ovate scales;

veins, costules, and costae adaxially glabrous or sparsely pubescent;

blade tissue without hairs on both sides, or hairy abaxially, usually with red to orange, shiny, sessile, hemispheric glands abaxially.

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.

= 144.

= 54.