Plants small to medium sized, light to dark green, brown proximally with age. Stems 1-3 cm. Leaves 2-8 × 0.7-1.5 mm, keeled and concave, rarely almost plane, rather narrowly lanceolate to lingulate, more or less undulate with rows of abaxial teeth on the undulations, the apex acute or sometimes proximal leaves obtuse; costa percurrent or subpercurrent with abaxial teeth near apex; lamellae 4-6(-8), laxly spreading, 4-6 (-9) cells high; median leaf cells 24-28 µm wide, rounded to ± regularly hexagonal, rather thick-walled, strongly collenchymatous with trigones, smooth or occasionally with minute, verrucose or striate papillae mainly on abaxial surface. Sexual condition polygamous, some shoots apparently unisexual males or females, others with both sexes; perigonia inconspicuous, the outer perigonial bracts resembling stem leaves but with a broader base, the inner small, ovate or suborbicular. Seta 1-3 per perichaetium, 1-3.5 cm, erect. Capsule 2-7 × 0.5-0.8 mm, cylindric, usually somewhat curved and inclined, sometimes straight and erect; operculum 2-3 mm. Spores 9-21 µm.
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