Flora of North America species comparison

long-creeping, cordlike, 3–6 mm diam.

creeping to suberect, 2–3 mm diam.

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

somewhat dimorphic, evergreen, laxly arching or prostrate, sterile leaves often rooting at attenuate apices or along rachises, mostly (10–)15–55 cm, fertile leaves more erect and with longer petioles, not rooting, with more contracted pinnules.

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

green, 1–25 cm × 0.5–1 mm, at base sparsely set with brown, lanceolate, stellate-hairy scales.

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

usually 10–30 cm, pinnate in proximal half only or throughout, narrowed distally 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.

entire to crenate to shallowly lobed ca. 1/3 of width, 1–2.5(–5) × 0.3–1(–1.5) cm, sometimes subcordate at base;

proximal pairs from adjacent segments usually united with excurrent vein or veins free.

round, medial to supramedial;

indusia tan, glabrous to hairy;

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

round, medial to supramedial;

indusia minute or lacking;

sporangia with stellate hairs.

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 stellate, forked, and needlelike hairs on rachises, costae, veins, and blade tissue;

blade tissue adaxially also with stellate hairs.

= 144.

= 144.