Flora of North America species comparison

long-creeping, 1.5–3 mm diam.

short-creeping, 4–10 mm diam.

monomorphic, dying back in winter, often 1 cm or more apart, fertile leaves often somewhat longer than sterile leaves, 25–80 cm.

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

straw-colored above base, 12–45 cm × 1–3 mm, at base sparsely set with tan, ovate, glabrous scales.

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

lanceolate, 14–35 cm, proximal pinnae largest, or lowest pair slightly smaller, blade tapered 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.

deeply pinnatifid to ca. 1 mm from costa, 3–10 × 1–2 cm;

segments oblong, somewhat oblique, entire;

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, medial;

indusia tan, often glandular;

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 0.2–0.4 mm primarily on costae, also of yellowish short-stalked glands less than 0.1 mm, blade tissue with numerous reddish to orangish, resinous, shiny, sessile, hemispheric glands;

blades adaxially with scattered hairs on veins.

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

blades glabrous adaxially.

= 128.

= 72.