Plants slender, very small to fairly elongate, gregarious to loosely caespitose, simple or forked by innovation, terete or julaceous. Leaves crowded and imbricate, broadly ovate or ovate-lanceolate, blunt or rounded at the apex or, sometimes in upper leaves, abruptly awned; margins plane, entire or crenulate to erose-denticulate; costa strong, ending at or near the apex or, in upper leaves, sometimes long-excurrent as an awn; upper cells smooth, oval, oblong-rhomboidal, or vermicular, thick-walled, smooth; basal cells quadrate to rectangular and thin-walled. Dioicous. Perigonia large. Setae short or ± elongate, erect, smooth; capsules immersed to exserted, erect and symmetric, ovoid to cylindric, smooth; annulus sometimes present; operculum rostrate from a conic base; peristome none or inserted below the mouth, entire to variously split or perforate, papillose or longitudinally striate. Spores spherical. Calyptrae cucullate, smooth, naked.