Schistidium Bruch & Schimp. in B.S.G., Bryol. Eur. 3: 93. 1845 nom. cons.
Plants in dark-green or blackish green tufts or cushions, mostly rupestral. Stems erect, forked or fastigiate branched, central strand present or absent; rhizoids sparse. Leaves crowded, hygroscopic, imbricate, erect‑patent, ovate‑lanceolate, plane, keeled or concave; apices gradually acute to acuminate, with or without a hyaline point; margins plane or recurved; costa single, strong, percurrent to excurrent, smooth or papillose, convex at back, mostly homogenous in cross‑section; lamina unistratose below, uni‑ to multistratose above, cells incrassate with straight or sinuose walls; upper cells mostly small and rounded‑quadrate, smooth or rarely papillose, basal cells elongate, not strongly differentiated. Dioicous or autoicous. Perichaetial leaves elongate, distinctly larger than vegetative leaves with stronger, usually excurrent costae. Setae short, straight. Capsules symmetric, immersed, erect, oblong to cylindrical, smooth or ribbed when dry; stomata present or absent; columella attached to the operculum frequently falling with it; opercula conic, apiculate to shortly erect; peristome of 16 cuneiform teeth, rarely rudimentary, entire, perforate or cribrose. Calyptrae small, just covering the capsule, mitrate or cucullate, not plicate.