Flora of North America species comparison

monomorphic or often somewhat dimorphic, 8–25 cm;

fertile leaves more erect than sterile leaves, long-petioled, petioles often 2–5 times longer than blades, fertile blades with more ascending pinnae and narrower segments than sterile blades.

monomorphic or weakly subdimorphic, 10–30 cm.

3–4-pinnate, 2–10 cm, somewhat leathery.

4-pinnate, 3–12 cm, nearly as wide as long, thin to thick.

linear, 3–8 mm;

midrib prominent abaxially.

narrowly lanceolate to deltate, 2–6 mm;

midrib obscure or evident abaxially.

of mature blades continuous along length of segments except at apex;

indusia linear, margins with 10–35, shallow, regular teeth or erose.

of mature blades ± discrete to usually subcontinuous, 3–7(–9) per segment;

indusia semicircular to usually elongate and connecting several adjacent sori, margins with 6–10 irregular and prominent teeth and/or lobes.

= 60.

= 120.