Flora of North America species comparison

short-creeping, 4–6 mm diam.

short-creeping, 4–10 mm diam.

often somewhat dimorphic, evergreen, often closely placed, 50–150 cm, fertile leaves with longer petioles and more contracted pinnae.

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

often purplish brown, 15–50 cm × 3–6 mm, at base with brown, linear-lanceolate, hairy scales.

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

(25–)40–100 cm, 1–4(–6) proximal pairs of pinnae reduced, blade gradually tapered 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.

7–17 × 1–3 cm, incised 1/2–3/4 of width;

segments rounded at apex, basal acroscopic segment of proximal pinnae often auriculate;

proximal pair of veins from adjacent segments united at obtuse angle below sinus with excurrent vein 2–4 mm.

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, medial to supramedial;

indusia tan, pubescent, hairs 0.1–0.3 mm;

sporangial stalks with orangish, stalked glands.

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

indusia lacking;

sporangia glabrous.

abaxially of uniformly short hairs 0.1–0.2 mm on costae, veins, and blade tissue;

veins adaxially with stouter hairs, also with hairs 0.1–0.2 mm on blade tissue.

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

blades glabrous adaxially.

= 144.

= 72.