Plants green to silvery green, reddish brown with age. Stems 1.5-2(-5) cm, simple to much branched by innovations. Leaves 1.5-3 mm, asymmetrically ovate to ovate-lanceolate, arcuate-incurved and falcate-secund when wet or dry; costa percurrent, the apex cucullate with a sharp point, smooth abaxially or slightly roughened; lamina strongly inflexed distally, smooth abaxially or with low teeth or abaxial lamellae only near apex; margins of lamina distantly serrulate or almost entire; adaxial lamellae 8-16, undulate, 4-10(-13) cells high, in profile irregularly serrulate and notched, the marginal cells in section undifferentiated, smooth; median basal cells short-rectangular, sometimes with small groups of alar cells larger; median cells of lamina isodiametric to short-rectangular, 6-15(-18) µm wide, walls firm, thickened at the angles; marginal cells ± at right angles to the margin, marginal teeth minute, unicellular; leaves of male plants only weakly falcate; perichaetial leaves longer and straighter than the vegetative leaves, convolute-tubulose, almost straight. Seta 1-1.5 cm. Capsule 3.5-4 mm, cylindric, widest at the base and tapering towards the mouth, sometimes indistinctly angled; operculum conic with a short beak; peristome teeth 32, tapering, subacute, often compound. Spores 19-21 µm.
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