Leucobryaceae

Diagnosis: Plants in compact or loose cushions or mats; stems simple or forked to irregularly branched. Leaves appressed, imbricate, elliptic-ovate at base, erect-spreading, straight or flexuose, subtubulose, at times falcate-secund above, consisting mostly of a broad costa; apex acute or obtuse and cucullate; margins incurved above, entire or weakly denticulate at the apex; cross section at base with a median row of small, green quadrangular cells enclosed by 2-8 layers of enlarged, hyaline cells; leaf lamina present from leaf base to midleaf, consisting of a narrow (2-12 rows of cells) marginal band of hyaline, linear, long-rectangular, short-rectangular or quadrate cells. Setae elongate; capsules cylindrical, curved or rarely erect, commonly strumose, ribbed or smooth when dry; annuli mostly nonrevoluble; peristome teeth divided 1/2 the distance to the base, vertically-striate, papillose or smooth on outer surface.