Flora of North America species comparison

with branching angle narrow, branches easily detached;

pseudoparaphyllia absent;

rhizoids axillary, purplish and granular-papillose at least when young.

leaves erect-appressed to loosely spreading, sometimes subsecund, lanceolate, not plicate, very small, 0.1–0.3(–0.5) mm;

base not decurrent;

margins plane, entire to serrulate, limbidia absent;

apex acuminate, acumen plane; ecostate or costa double, very short, indistinct;

alar cells scarcely differentiated to subquadrate, region small, inconspicuous, along basal margins;

medial laminal cells subquadrate, oblong-rhombic, or short-rhomboidal;

marginal cells 1-stratose.

erect-spreading or sometimes ± secund, 0.1–0.3(–0.5) mm;

base not or somewhat narrowed to insertion;

margins serrulate, especially at insertion;

alar cells subquadrate, region of 3–7 cells;

distal laminal cells shortly oblong-rhomboid, 3–4:1.

0.6–1.1 cm.

dioicous;

perichaetial leaf margins ciliate-dentate distally.

autoicous or dioicous.

erect, oblong-cylindric, symmetric or nearly so, 0.5–1 mm, contracted below mouth and at neck when dry, neck short;

stomata in neck;

annulus 2-seriate;

operculum convex-conic, stoutly mammillate to ± rostellate;

exostome teeth whitish yellow;

endostome cilia 1 or 2, rudimentary to well developed.

erect or variously inclined, oblong-cylindric to oblong-obovoid, symmetric or asymmetric;

peristome perfect or somewhat specialized;

exostome margins entire or dentate distally;

endostome cilia absent or 1–3, rudimentary to well developed.

11–13 µm.

8–13 µm.

asexual reproduction by axillary obcuneate propagula.