Flora of North America species comparison

creeping for 2–5 cm, then ascending or suberect, 1.5–3 mm diam.

short-creeping, 4–10 mm diam.

monomorphic, dying back in winter, tightly clustered, (25–)40–105 cm.

monomorphic, evergreen, ca. 65–200 cm or more.

straw-colored, 3–20(–35) cm × 1–3 mm, at base with scales tan to reddish brown, ovate, glabrous.

tan, (25–)40–120 cm × 4–10 mm, at base with scales absent or ephemeral.

elliptic, 20–70 cm, proximal 4–10 pinna pairs gradually reduced (smallest 5–20 mm), blade tapering gradually to pinnatifid apex.

40–100 cm or more, gradually reduced distally with lanceolate apical pinna that is 1/4 to equaling longest lateral pinna;

buds sometimes present at base of proximal pinna.

3–10 × (0.6–)1–2 cm, deeply pinnatifid to within 1 mm of costa;

segments oblong to linear, oblique (sides slanted, not perpendicular to costa), entire to crenulate;

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

lanceolate, 15–25 pairs, (10–)15–25 × (1.5–)2.5–3.5(–4.5) cm, rounded to truncate at base, margin hooked-serrate;

main lateral veins of fertile pinnae 3–5 per cm, with rows of 10–18 areoles between costa and margin, cross-veins somewhat curved.

round, supramedial;

indusia tan, glabrous or short-ciliate, sometimes also with glands;

sporangia glabrous.

oblong-arcuate, uniseriate between main lateral veins on cross-veins, often appearing confluent at maturity;

indusia lacking;

sporangia glabrous.

abaxially of sparsely set hairs 0.2–0.7 mm on rachises, costae, and sometimes veins, also of numerous orangish, sessile to usually short-stalked glands on blade tissue;

blades adaxially glabrous except along costae.

abaxially of spreading, irregularly crimped hairs ca. 0.2–0.3 mm on costae and sometimes veins adaxially;

blades glabrous adaxially.

= 54.

= 72.