Flora of North America species comparison

scales appressed, bicolored with margins transparent.

scales spreading, concolored.

3–25 × 0.3–1.6 dm.

2.5–10.7 × 0.3–0.7 dm.

0.4–4.4 dm, moderately to densely scaly;

scales appressed, dark brown with pale margins.

0.3–2 dm, moderately to densely scaly;

scales spreading, pale brown throughout.

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

lacking scales, glabrous (rarely with a few branched hairs abaxially).

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

reniform to lunate or deltate-rounded, attached along broad sinus, 1.1–1.7 mm wide.

absent.

present or absent.

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

scales scattered to dense, brown, margins pale.

2.2–9 dm, points of pinna attachment 5–12 mm apart;

scales moderately spaced to dense, pale to dark brown, point of attachment distinctly darker.

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.

pinnae oblong to lanceolate-oblong, straight to slightly falcate, 0.9–5 × 0.4–0.9 cm, base auriculate-cordate, acroscopically overlapping rachis, acroscopic lobe deltate, margins entire to serrulate to smoothly crenate, apex acute to bluntly rounded;

costae adaxially glabrous.

= 82.

= 82.