1. Cinclidium arcticum (Bruch & Schimp. in B.S.G.) Schimp. 极地北灯藓 ji di bei deng xian
Kongl. Vetensk. Acad. Handl. 1846: 143. 1848. Mnium arcticum Bruch & Schimp. in B.S.G., Bryol. Eur. 4: 203. 1846. Type: Norway. Dovre, Schimper s.n.
Plants slender, elongate, reddish brown, in loose tufts. Stems erect, ca. 10 cm high, reddish brown, often branched near stem apex, with dense, brownish rhizoids. Leaves sparse at lower part of stems, often forming rosettes at top of stems, oblong to obovate, 2.5–3.0 mm long, acuminate; margins entire, narrowly bordered by 2–3 rows of differentiated cells, with reddish brown color, narrowly long-decurrent at base; costae ending in the apex; leaf cells usually hexagonal, thin- to moderately thick-walled. Dioicous. Setae solitary, slender, to 2 cm long; capsules elongate-pyriform, pendulous; neck thick and short; exostome teeth short, yellowish; endostome segments narrowly elongate, fused; cilia absent. Spores 25–60 µm in diameter, minutely papillose.