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 to robust, julaceous, apices curving up;

central strand absent;

paraphyllia absent.

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 when dry, erect-spreading when moist, dull, ovate-lanceolate, symmetric, strongly falcate-secund, 1.5–2.5 mm;

margins recurved proximally;

apex gradually acuminate, hair-point present;

costa ending in acumen, not percurrent, green to yellow-green, not usually sinuate;

alar cells quadrate to short-rectangular, region medium-sized;

medial laminal cells elongate-rhomboidal, to 30 µm, 2–3:1, translucent, prorate, walls incrassate, somewhat pitted;

juxtacostal cells longer, narrower than medial, walls 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 to suberect, symmetric, 0.8–1.7 mm;

operculum conic-apiculate;

endostome basal membrane 1/3–1/2 exostome length, segments often longer than exostome teeth, cilia slender, 1 or 2, or often rudimentary to absent.

16–22 µm.

(14–)20–28 µm.