Treatment appears in FNA Volume 27. Treatment on page 111. Mentioned on page 116.
Plants minute and budlike or merely small, forming dense turfs or scattered patches; protonema producing chlorophyllose, perpendicular protonematal flaps, which are persistent or disappear after the development of the gametophores. Stems erect, to 1.5 cm. Leaves ovate or lanceolate, erect, three-ranked and appressed or spreading, costate or ecostate, cells smooth, rounded-hexagonal or oblong-rhomboid, basal cells elongate. Sexual condition autoicous; archegonia and antheridia on short stems at the plant base. Seta straight or flexuose, smooth or papillose. Capsule exserted, single, cylindric, ovate or shortly oblong-cylindric; peristome of four, single, unsegmented, narrowly triangular, multicellular teeth; annulus absent. Calyptra mitrate, smooth or plicate, naked. Spores green to yellowish, 10–16 µm, spheric, smooth or finely papillose.


Distribution values could not be resolved to valid regions

Circumboreal, disjunct to the Southern Hemisphere.


Genera 2, species 4 (2 genera, 4 species in the flora).



Lower Taxa


1 Plants with conspicuous stems to 1.5 cm, forming dense turfs or scattered patches, leaves costate, protonematal flaps not persistent, stalked asexual structures often present. Tetraphis
1 Plants minute, bud-like, stems less than 0.05 cm, leaves weakly costate in distal leaves or costa absent, protonematal flaps persistent and usually present, specialized asexual structures absent. Tetrodontium