Schlotheimia Brid., Muscol. Recent. Suppl. 2: 16. 1812.
Plants small to medium-sized, dark-green above, reddish brown below, thickly matted with dense reddish tomentum. Primary stems creeping, with erect or ascending secondary stems or branches. Leaves imbricate, often spirally twisted around stems when dry, erect to erect-spreading, apices recurved when wet, linear-lanceolate, lingulate to oblong‑ovate; margins entire, not bordered; costae strong, percurrent to excurrent; upper cells smooth, incrassate, rounded to rhomboidal, basal cells elongate‑rhomboidal, incrassate and porose, occasionally with projecting end‑walls. Dioicous. Perichaetial leaves sometimes strongly differentiated. Setae erect, smooth; capsules usually exserted, elliptic to cylindrical, smooth or weakly furrowed; stomata present or absent; opercula short-rostrate; exostome teeth 16, linear‑lanceolate, densely horizontally striate on outer surface, median furrow weakly or strongly developed, endostome of 16 broad segments, occasionally splitting into 32 narrow segments, often fully divided along the keels and so appearing opposite to the exostome teeth, segments nearly as long to _ the length of the exostome teeth, yellow, vertically striate on inner surface. Calyptrae mitrate-campanulate, 4–6 lobed, smooth or papillose. Spores anisosporous (isosporous outside Central America), papillose.