2. Brachythecium amnicola Müll. Hal. 密枝青藓 mi zhi qing xian
Nuovo Giorn. Bot. Ital., n.s., 3: 125. 1896. Type: China. Shaanxi, Huojiacai, 20 Sept. 1890, Giraldi 1008 (FI).
Plants rather large, in dense mats, often growing on rocks near rivers. Stems prostrate, simple, often with flagelliform branches, curved at tips, or irregularly branched, with branches unequal, ca. 1.0–2.0 cm long, julaceous, densely foliate. Stem and branch leaves similar, ovate-lanceolate, 1.62–1.76 mm × 0.54–0.66 mm, concave, weakly bi-plicate, sometimes not clearly plicate, slenderly acuminate at apex; margins plane, entire, or only serrulate near leaf apex, slightly decurrent at base; costae ca. 3/4 the leaf length; median leaf cells linear-rhomboidal, 48–50 µm × 4–5 µm; alar cells differentiated, shortly rectangular or hexagonal, often extending close to costa at leaf base. Sporophytes not seen.