29. Brachythecium procumbens (Mitt.) A. Jaeger 匐枝青藓 pu zhi qing xian
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876–77: 341. 1878. Hypnum procumbens Mitt., J. Proc. Linn. Soc., Bot., Suppl. 1: 70. 1859. Type: India.
Plants medium-sized, slender, yellowish green, slightly glossy, in dense mats. Stems prostrate, curved, irregularly branched; branches simple or further branched, julaceous, densely foliate. Stem leaves imbricate when dry, erect-spreading when moist, broadly ovate, 1.5–1.7 mm × 0.6–0.7 mm, concave, plicate, abruptly, shortly acuminate at apex; margins entire below, serrulate above; costae ca. 2/3–3/4 the leaf length; median leaf cells rhomboidal to elongate-rhomboidal, 45–65 µm × 6–8 µm; basal cells lax; alar cells inflated, quadrate or shortly rectangular; branch leaves ovate or ovate-lanceolate, 1.3–1.6 mm × 0.5–0.6 mm, shortly acuminate at apex, somewhat decurrent at base; margins serrulate above; costae ca. 1/2 the leaf length. Dioicous. Sporophytes on main stems. Perichaetial leaves lanceolate, erect, reflexed above. Setae ca. 20 mm long, twisted, smooth; capsules inclined, elongate-ovoid, curved; opercula shortly conic-rostrate; peristome not seen. Spores not seen.