Flora of North America species comparison

with branches robust, julaceous, apices usually curving up;

central strand present;

paraphyllia many, filamentous to foliose, branched.

with branches slender, not or rarely julaceous, apices straight to rarely curving up;

central strand present;

paraphyllia many, filamentous to foliose, not branched.

appressed to somewhat erect when dry, erect-spreading when moist, glossy or dull, ovate to ovate-lanceolate, asymmetric, usually falcate to falcate-secund, 0.6–2(–2.4) mm;

margins narrowly recurved to mid leaf or to near acumen;

apex abruptly acute to short- or long-acuminate, hair-point absent;

costa subpercurrent to percurrent, yellow-green, sometimes sinuate;

alar cells transversely elongate to quadrate, region small to medium-sized;

medial laminal cells homogeneous, short-rhomboidal, elliptic, or fusiform, to 40 µm, 2–3(–4):1, pellucid to opaque, prorate to near base, lumina larger than 10 µm, walls thin or rarely firm, not pitted;

apical cells 2–3:1;

juxtacostal cells somewhat shorter than more distal cells, walls not pitted.

appressed to somewhat erect when dry, erect-spreading when moist, glossy, ovate-lanceolate to lanceolate, symmetric, not or rarely falcate except at apices, 0.9–2 mm;

margins recurved to just before acumen;

apex gradually and slenderly long-acuminate, hair-point absent;

costa percurrent, green to yellow-green, not sinuate;

alar cells transversely elongate to quadrate, region small;

medial laminal cells elongate-rhomboidal to fusiform or somewhat vermicular, to 30 µm, 2–3(–4):1, pellucid, strongly papillose over lumen, papillae usually off-centered to distal edge, rarely some cells prorate, walls firm to incrassate, not pitted;

juxtacostal cells somewhat shorter than more distal cells, walls not pitted.

erect to suberect, symmetric, 1–2 mm;

endostome basal membrane 1/4–1/3 exostome length, segments shorter than exostome, cilia usually present, 1 or 2, sometimes reduced.

erect, symmetric, 1–3 mm;

endostome basal membrane 1/4 exostome length, segments shorter than exostome, cilia absent or rudimentary.

16–22 µm.

16–20 µm.