Ptychomitrium Fürnr., Flora 12 (Erg. 2): 19. 1829.
Plants small to large in dark-green, blackish or brownish green tufts or cushions. Stems erect, simple or forked. Leaves crisped, inrolled or appressed when dry, erect‑spreading to spreading when wet, oblong to lingulate‑lanceolate or lanceolate; apex cucullate, broadly acute to acuminate; margins erect, recurved or incurved, uni‑ or bi‑stratose, entire or serrate; costa single, strong, subpercurrent to percurrent; lamina uni‑ or bistratose; upper cells rounded‑quadrate, firm‑walled, basal lower cells elongate to oblong or quadrate to short‑rectangular, smooth. Autoicous. Perichaetial leaves not differentiated. Setae single or multiple. Capsules exserted, oblong to cylindrical; opercula long-rostrate; peristome of 16 teeth split nearly to the base into 2–3 papillose divisions. Calyptrae mitrate, deeply lobed, plicate.