6. Campylopus gracilis (Mitt.) Jaeg. 纤枝曲柄藓 qian-zhi qu-bing xian
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1870–71: 427. 1872. Dicranum gracile Mitt., J. Proc. Linn. Soc. Bot. Suppl. 1: 17. 1859. Syntypes. India: Sikkim, J. D. Hooker 69, 72.
Plants medium-sized to large, 2–6(8) cm high, yellowish green to grayish green, shiny, in dense tufts. Stems erect or ascending, simple or branched, brood bodies often present in the axils of the upper leaves; central strand present. Leaves flexuose or appressed when dry, erect-patent when moist, (4–)7–9 mm long, lanceolate, gradually narrowed to a subulate acumen, lamina not extending beyond 1/3 the leaf length; margins involute, entire below, serrulate only at the apex; costa broad, occupying 3/4 the leaf base width, shortly excurrent, not ending in a hyaline point, dorsal cells with incrassate walls and large lumina, without clearly defined stereids, usually with ridges at back in the upper part in transverse section; upper cells small, short-rectangular, ca. 14 µm × 5 µm, not particularly thick-walled; basal cells rectangular, 30–45 µm × 8–12 µm, becoming narrower and with several rows of linear cells at the margins; alar cells forming well marked auricles, inflated, hexagonal, reddish brown, clearly protruding into the costa. Dioicous. Perichaetia yellowish, with elongate paraphyses. Setae straight or flexuose when dry, cygneous when moist, up to 1.1 cm long, yellowish; capsules cylindric, ca. 1.7 mm × 0.4 mm, reddish brown, clearly plicate when dry; opercula obliquely rostrate; peristome teeth reddish brown, divided to the middle, papillosely striate. Calyptrae fringed at base. Spores not seen.