Flora of North America species comparison

to 16 per plant, pale brown, 0.5-1 mm diam., producing proliferations.

to 25 per plant, tan to brown, 0.5-1.5mm diam., straight, producing proliferations.

upright, to 1.6 cm, 5mm diam., commonly 2 leaves per stem.

upright, to 1.5 cm, 4 mm diam., leaves 1-2 per stem.

stalk 0-1.8cm, to 2.5 times length of trophophore blade.;

trophophore blade erect to spreading, commonly ± folded when alive, green, dull, without pale central band when dried, to 4.3 × 1 cm (rarely 0.4 × 0.3 mm), herbaceous, thick, gradually tapering to base, apex attenuate;

venation complex-reticulate, with numerous parallel narrow areoles, each with 1-several included veinlets.

stalk to 0.1 cm, 0.01 times length of blade.;

trophophore blade erect to spreading, commonly ± folded when alive, uniformly pale green throughout when dried, dull, ovate to ovate-lanceolate, 10 × 4.5 cm, firm, herbaceous, base narrowed abruptly, apex with apiculum to 0.8 mm;

venation complex-reticulate, veinlets forming numerous, very tiny, secondary areoles within the major areoles.

arising near ground level, 1-2.5 times length of trophophore;

sporangial clusters 8-15 × 1-3 mm, with 8-15 pairs of sporangia, apiculum 0.3-1 mm.

arising at ground level, 1.3-2.5 times as long as trophophore;

sporangial clusters 2-4 × 0.13-0.31 cm, pairs of sporangia 20-40, apiculum 0-1.3 mm.