Campylopus Brid., Musc. Recent. Suppl. 4: 71. 1819.
Plants small to robust, densely tufted; stems sparsely branched, often densely tomentose; leaf rhizoids frequently on the lower dorsal surface of the costa; in cross section with a well-developed central stand. Leaves ovate-lanceolate to ovate-subulate, variably toothed, nearly always denticulate at the extreme apex; costa broad, occupying most of the upper leaf, percurrent to excurrent, often ribbed or mammillose at back, at times with multi-cellular lamellae; cells smooth, porose or entire, upper cells quadrate, oval, rhombic, oblong, rhomboidal or elongate, usually in oblique rows, incrassate, marginal cells at base at times forming a hyaline border; alar cells commonly well-developed. Dioicous. Setae cygneous when moist; capsules exserted, ovoid to ellipsoid, strumae present or absent, erect or curved; stomata absent; annuli present; peristome teeth 1/2 to nearly their full lengths divided into two filaments, generally striate on the outer surface; opercula rostrate. Calyptrae cucullate, entire or fringed at base by long, single-celled hairs. Spores yellow to brown, variously papillose.