Plants small to medium-sized, gregarious to tufted or caespitose, green to yellowish brown, sometimes with pink tinge. Stems erect. Leaves sometimes dimorphic with vegetative leaves mostly grading into gemmiferous leaves, teniolae absent (teniola-like features rarely present in a few taxa); margins of distal lamina mostly thickened and toothed, rarely 1-stratose, in many taxa regularly bordered entirely or in part with elongate hyaline cells; costa showing two bands of stereids in cross section; medial leaf cells isodiametric. Specialized asexual reproduction by gemmae common on often modified leaves, borne on apices or adaxially and sometimes abaxially along costa of distal lamina, clavate-fusiform or filamentous. Sexual condition mostly dioicous, rarely apparently monoicous. Seta single, rarely 2-3 per perichaetium. Capsule mostly exserted, sometimes immersed, mostly cylindric; peristome present or absent. Calyptra deciduous, mostly cucullate, rarely conic-mitrate.
|[Greek syrrepo, to close the eye, and odon, tooth, alluding to narrow, connivent, horizontal peristome teeth of some species closing capsule mouth upon drying]|