Flora of North America species comparison

usually long-creeping, 3–6 mm diam.

short-creeping to suberect, 5–10 mm diam.

monomorphic, evergreen, (0.5–)1–4 cm apart, (30–)55–135(–165) cm.

monomorphic, dying back in winter, crowded, (15–)25–100 cm.

straw-colored, 15–80 cm × 2–6 mm, at base with tan to brownish, linear-lanceolate, hairy scales.

straw-colored to tan above base, 3–20 cm × 2–5 mm, scales on petioles and rachises tan to straw-colored, persistent, ovate to lanceolate.

about equaling petiole length, broadest at base, gradually to somewhat abruptly tapered to pinnatifid apex.

elliptic, 25–80 cm, 5–10 pairs of proximal pinnae gradually smaller toward base, lowest pinnae ca. 1 cm, blade tapering gradually to pinnatifid apex.

(5–)10–25 × 0.8–2.2 cm, incised 4/5 of width;

segments oblique, somewhat curved, basal pair from middle pinnae often elongate parallel to rachis;

proximal pair of veins from adjacent segments reaching margin at or just above sinus.

deeply pinnatifid to ca. 1 mm or less from costa, 3–12 × 1–2 cm;

segments linear to oblong, somewhat oblique and often somewhat curved, entire or crenulate, basal segments of proximal pinnae more often crenulate;

proximal pair of veins from adjacent segments meeting margin above sinus.

round, supramedial to inframarginal;

indusia tan, hairy, hairs mostly 0.2–0.4 mm;

sporangia glabrous.

round, submarginal;

indusia tan, glabrous;

sporangia glabrous.

abaxially of hairs mostly 0.2–0.5 mm on costae, veins, and blade tissue, also sometimes of a few tan scales on costae and rachises;

blades adaxially glabrous except along rachises and costae.

abaxially of tan to whitish linear scales along costae, hairs lacking or sparse along costae, blade tissue lacking glands or sparsely glandular.

= 72.

= 68.