Stems with exterior cells in 2 or 3 rows, small, walls thick, interior cells larger, walls moderately thick. Leaves with base undifferentiated or occasionally indistinctly decurrent; margins double-serrate from near base; costal stereid cells well developed on both sides of guide cells; juxtacostal basal cells often weakly differentiated, short-to long-rectangular, enlarged, lax or not; medial and distal laminal cells uniform, isodiametric, rounded to 4-6-sided, smooth, walls thick; marginal cells 2-stratose. Seta wiry. Capsule striate and flared at mouth when deoperculate; exothecial cells hexagonal [quadrate-to rectangular-rounded], walls moderately thick, somewhat weakly collenchymatous at base; stomata few at base and in neck, superficial.
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