3. Brachymenium exile (Dozy & Molk.) Bosch & Sande Lac. 纤枝短月藓 qian zhi duan yue xian
Bryol. Jav. 1: 139 1860. Bryum exile Dozy & Molk., Ann. Sci. Nat., Bot., ser. 3, 300. 1840. Type: Indonesia. Java.
Brachymenium sikkimense Ren. & Card., Bull. Soc. Roy. Bot. Belgique 38(1): 12. 1900.
Bryum tectorum C. Müll., Nuovo Giorn. Bot. Ital., n.s., 3: 95. 1896, hom. illeg. Type: China. Shaanxi (Schen-si), Sept. 1894, Giraldi s.n.
Plants small, ca. 5 mm high, yellowish green or pale brownish green, in loose or dense tufts. Stems erect, with a few newly innovated branches. Leaves crowded, larger above, erect-spreading when dry and moist, ovate-lanceolate to lanceolate, ca. 1.0 mm × 0.5 mm, somewhat keeled; margins entire, slightly recurved below; costae excurrent; median leaf cells elongate-hexagonal to rhomboidal, 25–45 µm × 8–10 µm; upper margins differentiated by 1 row of somewhat rectangular cells; basal cells nearly quadrate to rectangular, all cells somewhat thick-walled. Dioicous. Setae 8–10 mm long; capsules often erect, ovoid to shortly pyriform, expanded at neck area; opercula conic; exostome teeth well developed; endostome segments reduced; basal membrane ca. 1/2 the teeth height; cilia rudimentary. Spores 10–13 µm in diameter.