Flora of North America species comparison

creeping to suberect, 2–3 mm diam.

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.

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

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

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 minute or lacking;

sporangia with stellate hairs.

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

blade tissue adaxially also with stellate hairs.

= 144.