Prodr. Aethéogam., 36, 87. 1805.
Plants in low, tangled mats. Stems sometimes leafless at apices, flagelliform. Leaves with costa strong. Sexual condition autoicous or synoicous, usually pseudautoicous with dwarf male plants; perigonia axillary; perichaetial leaves small, apex long-awned. Capsule sulcate when dry; stomata present proximally; operculum rostrate; exostome teeth with zigzag median line; endostome segments delicate, cilia delicate, nodose. Calyptra usually with delicate hairs proximally, sometimes naked with age.
Fla., Mexico, West Indies, Central America, South America, Eurasia, Africa, Pacific Islands, Australia.
Species ca. 63 (1 in the flora).