11. Racomitrium fasciculare (Hedw.) Brid. 丛枝砂藓 cong-zhi sha xian
Muscol. Recent. Suppl. 4: 80. 1819. Grimmia fascicularis (Hedw.) C. Müll., Syn. Musc. Frond. 1: 809. 1849. Trichostomum fasciculare Hedw., Sp. Musc. Frond. 110. 1801. Type. Europe.
Racomitrium fasciculare var. orientale Card., Bull. Herb. Boissier, ser. 2, 8: 334. 1908.
Plants medium-sized to rather large, up to 5–6 cm long, green or yellowish green above, brownish green or brown below, in patchy, loose tufts. Stems ascending, densely subpinnately branched, with short branches; central strand absent. Leaves imbricately appressed when dry, erect-spreading when moist, narrowly ovate-lanceolate, somewhat concave and keeled above, sometimes slightly contorted, bluntly acuminate or acute, without hyaline hair-points; margins recurved on both sides; costa strong, percurrent or nearly so; upper and median leaf cells rectangular, 15–35 µm × 4–6 µm, sinuosely thick-walled, with dense, rounded papillae, unistratose at margins; basal cells elongate-rectangular to linear-rectangular, strongly sinuosely thick-walled; alar cells not differentiated, with only a row of rectangular, hyaline, nearly straight-walled cells. Perichaetial leaves oblong-ovate with short lanceolate apex. Setae erect, 5–10 mm long; capsules cylindrical, 1.2–1.8 mm long; opercula long-rostrate; peristome teeth linear-lanceolate, divided nearly to the base, densely papillose. Spores spherical, minutely papillose.