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.
Brachymenium exile (Dozy & Molk.) Bosch & Lac., Bryol. Jav. 1: 139. 1860.
Bryum exile Dozy & Molk., Ann. Sci. Nat. Bot. sér. 3, 2: 300. 1844. Protologue: Java, Sumatra.
Plants minute, yellow-green, gregarious or in tufts. Stems slender, 2–7 mm long, epidermal cells rectangular, sparsely tomentose at base; rhizoids reddish brown, lightly papillose. Leaves 0.5–0.8 mm long, erect-appressed to imbricate, spreading when wet, concave, ovate; apices short acuminate; margins weakly bordered by short-rectangular cells, entire, erect above, slightly reflexed below; costa stoutly short-excurrent, ventral superficial cells at base quadrate to rectangular; cells firm-walled throughout, upper cells hexagonal to rhomboidal-hexagonal, 30–50 x 10 μm, basal cells quadrate to short-rectangular, 10–20 x 10 μm. Bulbous axillary gemmae sometimes present. Dioicous. Setae 15–30 mm long, red. Capsules 1.5–2.0 mm long, claviform to obovate-oblong, constricted at neck, erect; opercula 0.3–0.5 mm long, conic; annuli compound, revoluble; exostome teeth whitish red, thickly papillose, endostome yellowish, papillose, basal membrane to ¾–_ the exostome teeth length, segments rudimentary, cilia rudimentary to absent. Spores 10–14 μm, lightly roughened. Calyptrae 1 mm long, cucullate, hyaline-yellow below, reddish above.