Plants light green or yellowish green. Stems 2-4(-5) mm. Leaves obovate to ovate-lanceolate, concave, distal leaves 1.2-2 mm; margins toothed distally; costa percurrent to subpercurrent. Specialized asexual reproduction as tubers occasionally present. Seta 2-3 mm. Capsule exserted, 0.5-1.2 mm, ovoid to hemispheric when young, cupulate following dehiscence of operculum, and usually becoming shallow and wide-mouthed with age; neck short, indistinct; exothecial cells irregular rounded-hexagonal, often with curved walls, sometimes collenchymatous (apparently only on young capsules); suboral cells weakly differentiated, usually consisting of 2-6 rows of irregularly isodiametric cells. Spores 24-38 µm, spiculose or papillose.
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