Flora of North America species comparison

scales appressed, bicolored with margins transparent.

3–25 × 0.3–1.6 dm.

0.4–4.4 dm, moderately to densely scaly;

scales appressed, dark brown with pale margins.

sparsely to moderately scaly, hairy abaxially, hairs pale brown, 0.1–0.3 mm.

circular to horseshoe-shaped, peltate or attached at narrow sinus, 1.1–1.3 mm wide.

absent.

2.7–20 dm, points of pinna attachment 8–24 mm apart;

scales scattered to dense, brown, margins pale.

pinnae narrowly deltate, sometimes elliptic, 3.4–12.3 × 0.6–1.8 cm, base rounded basiscopically, slightly auriculate to truncate acroscopically (latter more common in sterile pinnae), acroscopic lobe acute to oblong, margins biserrate to irregularly serrate to serrulate, apex attenuate and occasionally slightly falcate;

costae adaxially densely hairy, hairs pale, erect, 0.1–0.5 mm.

= 82.