Flora of North America species comparison

leaves ± catenulate when dry, not homomallous, ovate, abruptly narrowed to apex, concave, not plicate, 0.4–1.2 mm, 1.5–2:1;

base flaring;

margins plane or rarely recurved proximally, entire;

apex short-acuminate, sometimes falcate;

costa usually double, or single, 2-fid, or sometimes ecostate, weak, not reaching mid leaf;

medial laminal cells 1–2(–3):1, walls firm, not incrassate.

and branch leaves differentiated.;

stem leaves catenulate or not, appressed to erect when dry, erect-spreading when moist, ovate to lanceolate, not to sometimes 2-plicate;

margins plane or recurved, entire to serrulate distally;

apex abruptly to gradually acuminate, hair-point absent;

costa single, double, 2-fid, or rarely ecostate, strong to weak, short to percurrent, not sinuate, sometimes somewhat obscure distally;

alar cells not well differentiated, quadrate to short-rectangular;

proximal laminal cells 1–2:1, walls not or obscurely pitted;

medial cells isodiametric, 2–3:1, smooth, walls firm to incrassate.

ovate to suborbicular, 0.4–0.8 mm;

laminal cell walls moderately incrassate.

more ovate, smaller;

apex often especially recurved or falcate;

costa usually weaker;

medial laminal cells usually shorter.

red-brown, 0.1–0.2 cm.

0.1–0.3 cm.

dioicous;

perichaetial leaves pale translucent, appressed to rarely recurved, longer, apex more acuminate.

inclined, subcylindric, asymmetric, 1.5–2.5(–3) mm.

erect or inclined, subcylindric to cylindric, curved-asymmetric or sometimes symmetric;

annulus present;

operculum conic, short-rostrate;

peristome well developed;

exostome teeth lanceolate or linear-lanceolate, finely horizontally striate;

endostome basal membrane moderately high, segments slender, lanceolate to filiform, cilia present, usually well developed.

10–18 µm.

8–18 µm, finely papillose.

leaves broadly ovate or suborbicular.

asexual reproduction absent.