Flora of North America species comparison

conspicuously whitish pruinose, stout, 3–12 mm diam., bland to slightly sweet-tasting;

scales concolored to weakly bicolored, uniformly dark brown or with pale margins and base, lanceolate, symmetric, margins denticulate.

long- to short-creeping, branched or not, bearing scales and few to numerous roots, usually dictyostelic.

to 85 cm.

monomorphic to dimorphic, circinate in bud.

stout, to 3 mm diam.

usually articulate at base [rarely nonarticulate, as in Loxogramme], lacking scales or sometimes scaly, with usually 3 vascular bundles.

ovate-lanceolate, pinnatifid, usually widest just above base, to 27 cm wide, stiff and leathery;

rachis sparsely scaly to glabrescent abaxially, glabrous adaxially;

scales bicolored, ovate-lanceolate, much more than 6 cells wide.

simple to often pinnatifid, pinnatisect, or pinnate, infrequently more divided;

rachis grooved or not adaxially.

oblong to linear, usually more than 12 mm wide;

margins entire to crenulate;

apex rounded to rarely broadly acute;

midrib glabrous adaxially.

free (and simple to several times forked) to often anastomosing in complex systems, areoles with or without included veinlets.

crowded against midrib, usually more than 3 mm diam., circular when immature.

borne abaxially on veins, round to oblong, occasionally elongate, rarely marginal, rarely covering surface;

paraphyses present or absent;

sporangia with stalk of 2 or 3 rows of cells;

indusia absent.

usually less than 52 µm, rugose, surface projections less than 3 µm tall.

usually transparent or yellowish (rarely greenish), all 1 kind, bilateral, monolete [rarely trilete, as in some Loxogramme], surface most often smooth, tuberculate, verrucose, or granulate, occasionally spiny, 64 per sporangium (spores globose and 32 per sporangium in apogamous spp.).

green, aboveground, cordate or elliptic, glabrous or sometimes glandular;

archegonia and antheridia borne on lower surface, antheridia 3-celled.

anastomosing, usually forming 1 row of areoles.

absent.

on blade absent, or petiole, rachis, costae, and sometimes blade tissue usually bearing hairs (these often septate and with reddish crosswalls) and/or scales.

= 74, 111.