Flora of North America species comparison

long-creeping, cordlike, 3–6 mm diam.

long-creeping, 1.5–3 mm diam.

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

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

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

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

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

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

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.

round, medial to supramedial;

indusia tan, glabrous to hairy;

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

round, medial;

indusia tan, often glandular;

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 0.2–0.4 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.

= 144.

= 128.