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, 10–35 cm.

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

4(–5)-pinnate, 3–12 cm, nearly as wide as long, papery.

linear, 3–8 mm;

midrib prominent abaxially.

lanceolate or deltate, 1.5–4 mm;

midrib usually obscure 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 short, discrete, 1–3(–5) per segment;

indusia semicircular, margins with 2–6 coarse, irregular teeth or ± entire.

= 60.

= 60, 120.