Flora of North America species comparison

scales spreading, concolored.

scales appressed, bicolored with margins transparent.

4–15 × 0.5–1.2 dm.

3–25 × 0.3–1.6 dm.

0.2–4 dm, sparsely to moderately scaly;

scales spreading, pale brown to reddish brown, concolored.

0.4–4.4 dm, moderately to densely scaly;

scales appressed, dark brown with pale margins.

glabrous, sparsely to moderately scaly abaxially near costae and adaxially.

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

reniform to horseshoe-shaped, attached at narrow or broad sinus, 1–1.7 mm wide.

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

absent.

absent.

2.4–16.3 dm, points of pinna attachment 7.3–21 mm apart;

scales moderately spaced, pale to dark brown, essentially concolored or margin indistinctly paler;

hairs absent.

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

scales scattered to dense, brown, margins pale.

pinnae deltate-oblong, slightly to distinctly falcate, 2.3–7.4 × 0.6–1.8 cm, base truncate to truncate-auriculate or auriculate, occasionally overlapping rachis, acroscopic lobe deltate to acute, margins serrulate, apex acute to deltate;

costae adaxially glabrous.

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.