1. Brothera leana (Sull.) C. Müll. 白氏藓 bai-shi xian
Gen. Musc. Frond. 259. 1900. Leucophanes leanum Sull., Musci Allegh. 41. 1846. Type. U.S.A.
Plants small, 3–8 mm high, green or yellowish green with grayish sheen, in dense, compact tufts. Stems radiculose at the base, with many small, spindle-shaped brood bodies clustered in axils of the upper leaves. Leaves linear-lanceolate, 3.0–3.6 mm long, gradually narrowed from a short, tubulose base, subtubulose above; margins entire or slightly serrulate at the tips; costa broad, filling 1/3–1/2 or more of the leaf base width and nearly all of the subula; laminal cells thin-walled, rectangular above, marginal cells somewhat elongate, laxer at the base; alar cells not clearly differentiated. Setae ca. 8 mm long, reddish brown; capsules reddish brown, ca. 1.0 mm long, 0.5 mm in diameter, without stomata. Spores 10–15 µm in diameter, pale yellowish, mostly smooth.