Sanionia uncinata (Hedw.) Loeske

Plants small to medium-sized. Stems ± pinnate. Stem leaves circinate, falcate, or rarely ± straight, plicate or strongly plicate, rarely not plicate, 0.4-1.1 mm wide; base rounded-triangular or ovate; margins plane or rarely partly recurved distally, denticulate or finely denticulate distally; apex long-or very long-acuminate; costa in bottom of shallow, wide-angled fold (or not in fold); alar region transversely triangular, transition to supra-alar cells sudden, supra-alar cells quadrate to rectangular, chlorophyllose, walls thin or slightly incrassate, eporose, region equal in size to or smaller than alar region; apical laminal cells with distal ends occasionally prorate abaxially. Perichaetia with inner leaves gradually narrowed to apex, margins finely denticulate to denticulate distally, apex long-acuminate. Capsule horizontal or rarely erect to inclined; exothecial cells ± isodiametric, in 1-3 rows; exostome unspecialized, teeth long, broad basally, border widened at transitional zone in pattern of external tooth; endostome unspecialized, in recently dehisced capsules pale, brownish to yellowish, basal membrane constituting 36-45% total endostome height, processes perforated only along midline, cilia well developed.