Flora of North America species comparison

often whitish pruinose, slender, to 6 mm diam., acrid-tasting;

scales weakly bicolored, lanceolate, contorted distally, bases and margins light brown, sometimes with dark central stripe, margins often coarsely dentate.

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.

to 30 cm.

to 85 cm.

slender, to 1.5 mm diam.

stout, to 3 mm diam.

oblong to rarely deltate, pinnatifid, usually widest near middle, occasionally at or near base, to 4 cm wide, somewhat leathery;

rachis sparsely scaly to glabrescent abaxially, glabrous adaxially;

scales lanceolate-ovate, usually more than 6 cells wide.

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.

oblong, less than 12 mm wide;

margins entire to crenulate;

apex rounded to broadly acute;

midrib glabrous adaxially.

oblong to linear, usually more than 12 mm wide;

margins entire to crenulate;

apex rounded to rarely broadly acute;

midrib glabrous adaxially.

midway between margin and midrib to nearly marginal, less than 3 mm diam., circular when immature.

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

more than 58 µm, rugose to verrucose, surface projections less than 3 µm tall.

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

free.

anastomosing, usually forming 1 row of areoles.

present, usually less than 40 per sorus, heads covered with glandular hairs.

absent.

= 74.

= 74, 111.