Flora of North America species comparison

short-creeping, thick, to 10 mm diam.

creeping to erect, scaly at apex.

monomorphic, evergreen, 60–150 cm.

monomorphic or somewhat dimorphic [dimorphic].

to 75 cm × 3–12 mm, glaucous when living.

in cross section with 2 crescent-shaped vascular bundles at base.

2–3-pinnate, to ca. 85 cm.

pinnate to pinnate-pinnatifid, rarely more than 2-pinnate [simple];

rachis grooved adaxially or not, grooves not continuous with grooves of next order.

to 35 × 10(–17) cm;

pinnules sessile to adnate, oblique, 2–8 × 0.8–2.5 cm, incised almost to costule into oblique segments 2–4 mm wide, segments entire to dentate or pinnatifid;

veins forked or simple.

free or anastomosing, running to margin, areoles with or without included free veinlets.

round, indusia small, less than 0.3 mm diam., glabrous or glandular;

sporangia with minute capitate glands near annulus.

inframedial to supramedial, occasionally nearly marginal, round or oblong, rarely elongate along veins;

indusia reniform or sometimes absent.

bilateral, monolete [rarely globose-tetrahedral and trilete], usually with a prominent, crested, echinate, or reticulate perispore.

green, cordate, usually hairy or glandular;

antheridia 3-celled.

abaxially of septate hairs 1–2 mm on costae and costules;

rachis, costae, and blade tissue with capitate glands 0.05 mm.

of transparent, needlelike, hooked, septate, or stellate hairs, or rarely hairs lacking.

= 124.