Bot. Zeitung (Berlin) 5: 99. 1847,.
Distal leaves long-subulate beyond an ovate, obovate, or elliptic base, 0.9–3.1 mm, leaf base usually strongly differentiated in shape; distal laminal cells short- to long-rectangular. Sexual condition paroicous. Seta 0.5–3 mm. Capsule neck short, obovate. Spores spinose or occasionally spinose-reticulate. Calyptra smooth.
Phenology: Capsules mature spring–summer.
Habitat: Most soil, fields, among grasses
Elevation: low to moderate elevations
Ont., Que., Ala., Ark., Calif., Conn., Del., D.C., Fla., Ga., Ill., Ind., Kans., Ky., La., Maine, Md., Mass., Minn., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., W.Va., Wis., Europe.
As discussed in detail by A. E. Rushing (1986), Bruchia flexuosa is the most widely distributed and most morphologically variable species of the genus.