Stems erect, 0.7-6 cm, leaves often branched in whorls in successive innovations. Leaves 1.2-2.5 mm, flat to channeled distally or at mid leaf, in transverse section at mid leaf often tapering from costa to leaf margin because of decreasing size of cells, mucro occasionally ending in a sharp, clear cell; marginal serrulations projecting from the distal end of cells of the hyaline cells of the leaf base; costa to 1/3 or more the width of the leaf near the base, basal cells 12-15 µm wide, 2-5:1; median and distal laminal cells 8-10 µm wide, 1(-2):1, walls rather thick, often irregularly so, large juxtacostally and decreasing in size to the leaf margin, irregular in shape from quadrate to rectangular, 1-2(-3):1, sometimes transversely elongate 2:1, occasionally with transverse walls oblique, marginal cells narrower in places and 2-3:1 occasionally approximating a border; papillae variously scattered or centered. Seta yellow to red‑brown, not or little twisted. Capsule 0.8-1.8 mm, red-brown when old; operculum 0.5-0.8 mm; peristome rudimentary or to 300 µm, yellow to orange, with a low, papillose basal membrane. Calyptra ca. 2.5 mm. Spores pale.
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