Plants rather fragile, forming extensive green carpets or as scattered stems among other bryophytes. Stems 3-12 cm. Leaves (4-)6-10 mm, ± distant, not crowded; closely appressed, straight or erect-spreading and weakly flexuose when dry, erect-spreading to widely spreading or weakly recurved when moist, caducous at the base of blade; sheath short, scarcely broadened and rather weakly differentiated; marginal lamina narrow, 2-3 cells wide, erect to somewhat involute towards the apex, entire to finely and obscurely serrulate from the middle upwards, the teeth rather weak and distant; costa smooth abaxially, ending in a short, weakly toothed tip; lamellae crenulate in profile, 8-12 cells high, with paired, projecting knobs along the margins, the marginal cells in section rather narrow, retuse, thick-walled, brownish, smooth; sheath cells rather short rectangular, 60-90 × 15-22 µm; cells of the marginal lamina ± isodiametric; perichaetial leaves with sheathing bases usually hidden by upper stem leaves. Seta 1.5-4.5 cm, brownish. Capsule 2.5-3.5 mm, sharply 4-5-angled, short rectangular to cubic.
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