Flora of North America species comparison

1.5–3 cm, 0.8–1 mm thick when dry, profusely branched, irregularly pinnate, primary branches prostrate to arcuate, mostly attenuate, secondary branches attenuate at apices;

central strand cells not differentiated;

pseudoparaphyllia absent;

rhizoids somewhat abundant.

2–3(–6) cm, 0.5–1 mm thick when dry, sparingly branched, primary branches prostrate or pendulous;

central strand cells well differentiated, smaller;

pseudoparaphyllia foliose;

rhizoids many distally.

appressed when dry, complanate when moist, ligulate, slightly narrowed mid leaf, 1.2–2(–2.2) mm;

base broadly decurrent;

margins plane, entire from base to apex (cells moderately mammillose at insertion), sometimes denticulate near apex;

apex acute, sometimes obtuse or slightly apiculate, intact;

costa strong, sharply ending a few cells before apex, sometimes fading in youngest leaves, not obscured by laminal cells distally, pellucid, abaxial costa cells smooth;

basal laminal cells hyaline or sometimes chlorophyllose, papillae few, region sometimes extending more than 1/2 length of leaf base;

distal cells quadrate, 6–8 µm, papillae many, branched.

appressed to almost recurved when dry, in slender forms julaceous to imbricate when dry, spreading when moist, long-lanceolate, somewhat plicate at base, 2.1–2.8+ mm in robust forms, 0.3–0.5(–0.6) mm in slender forms;

base broadly decurrent;

margins revolute near shoulder, entire to serrulate, often with shorter and wider cells near apex;

apex subulalike, intact;

costa strong, percurrent, obscured by laminal cells distally, yellowish, abaxial costa cells often scabrous distally;

basal laminal cells not hyaline, smooth, region extending less than 1/4 length of leaf base;

medial cells rectangular, 5–13 µm, papilla 1, central, unbranched.

1–1.5 cm.

oblong, urn 1.6–2.8 mm;

stomata at base;

annulus not differentiated;

operculum obliquely short-rostrate, 1.3 mm;

exostome teeth irregular, 0.3 mm, striolate proximally, trabeculate and ± finely papillose towards apex;

endostome basal membrane 3 or 4 cells high, segments well developed.

10–13 µm, densely papillose.

never beyond last branching points, leaves abruptly narrowed, costa to beyond mid leaf, ending near apex in most interior leaves, laminal cells smooth.

on distalmost portions of branches (with minute or flagelliform branches produced distally from inflorescences), leaves with laminal cells smooth near apex.

unknown.