Clades:
Thuidiales,
Bryidae,
Bryophyta,
Plants.
Genera: 14; ± 50 species.
Region: North America, Europe, Asia, Atlantic Islands, Pacific Islands.
Habitat: south-temperate, extend into the tropics
BotanyMoss; small to large; pale to dark green or golden.
Stems: terete-foliate, irregularly pinnate to regularly 2-pinnate or 3-pinnate, often somewhat stipitate; hyalodermis absent, cortical cells small, walls incrassate; paraphyllia absent; pseudoparaphyllia foliose; axillary hair basal-cells 1 or 2, short, brown, apical cells 1–4, elongate, hyaline; peristomes hypnoid, sometimes reduced.
Leaves: ovate, concave; stem and branch leaves often differentiated, loosely appressed; base decurrent; costa single or double, short, sometimes weak on stipe and stem-leaves and strong on branch leaves; alar cells usually well differentiated, usually quadrate, often excavate; medial laminal cells short to linear, smooth or prorulose.
Sexual condition dioicous; seta long or sometimes short, smooth or roughened throughout or distally.
Capsule: erect or sometimes horizontal, cylindric, symmetric or sometimes curved; annulus usually differentiated; operculum conic to short-rostrate, straight; peristome double, perfect or sometimes reduced; exostome, when not reduced, with external surface cross-striolate proximally, papillose distally, when reduced, striate, papillose, or smooth; endostome basal membrane high or low, segments long, narrowly perforate, cilia nodose or appendiculate; calyptra cucullate, smooth or slightly roughened, naked or frequently characteristically hairy.
Genera: Acrocladium, Bestia, Camptochaete, Dolichomitriopsis, Fallaciella, Fifea, Isothecium, Lembophyllum, Looseria, Neobarbella, Pilotrichella, Rigodium, Tripterocladium, Weymouthia.
Key
1 Costae short and double or rarely single in isolated leaves; stem and branch leaves differentiated: Tripterocladium
1 Costae single; stem and branch leaves similar: > 2
2 Medial laminal cells less than 4:1; capsules erect; peristome reduced: Bestia
2 Medial laminal cells more than 5:1; capsules suberect, inclined, or rarely erect; peristome perfect: Isothecium.
Literaturehttp://dev.floranorthamerica.org/
Lembophyllaceae.