2. Bryum alpinumHuds. ex Wither. 高山真藓 gao shan zhen xian
Syst. Arr. Brit. Pl. (ed. 4) 3: 824. 1801. Mnium alpinum (Huds. ex Wither.) P. de Beauv., Prodr. Aethéogam. 73. 1805. Type: Great Britain.
Plants small, ca. 5–10 mm long, pale green, yellowish green to yellowish brown or reddish, glossy, in tufts. Stems erect, usually branched, with rhizoids hardly present. Leaves somewhat stiff, erect or spreading when dry or moist, ovate-lanceolate, acuminate, keeled, ca. 2 mm × 0.5 mm; margins recurved, entire or serrulate near apex; costae shortly excurrent; median leaf cells rhomboidal, 42–75 µm × 9–12 µm, thick-walled; basal cells rectangular; marginal cells gradually narrowed, borders not clearly differentiated. Dioicous. Setae 15–25 mm long; capsules pendulous, dark reddish, pyriform, ca. 3 mm long; neck developed; peristome well developed; cilia 2–3. Spores small, ca. 12 µm in diameter.