Plagiobryum Lindb., Öfvers. Förh. Kongl. Svenska Vetensk.-Akad. 19: 606. 1862 .
Zieria Schimp., Coroll. Bryol. Eur. 68. 1856, hom. illeg. non J. E. Smith, 1798.
Plants small, erect, in low, dense tufts, simple or sparsely, irregularly branched; rhizoids at base. Leaves appressed to imbricate, ovate to ovate-lanceolate; apices acute; margins plane to irregularly recurved, entire to serrulate above; costa single, ending below the apex to percurrent; cells hyaline above, chlorophyllose below, smooth, lax, thin-walled, upper cells oblong-rhomboidal, basal cells short-rectangular. Dioicous. Setae elongate, curved. Capsules inclined to pendent, asymmetric oblique at mouth, long-clavate, neck well-developed; stomata superficial; opercula low-conic; annuli revoluble; peristome diplolepidous, exostome teeth papillose, reticulate, or striate below, smooth above, trabeculae weakly projecting, endostome basal membrane well-developed, segments slender, narrowly perforate, cilia rudimentary. Spores adhering in tetrads until maturity, ellipsoid, papillose. Calyptrae cucullate, naked.