Dicranum hamulosum Mitten 1891

Plants small to medium-sized, to 2.5 cm high, soft, yellowish to dull yellowish green, somewhat shiny, in compact tufts. Stems erect, closely foliate, simple or branched, radiculose at base; central strand present. Leaves 4–6 mm long, falcate-secund, crispate when dry, erect-spreading when moist, narrowly lanceolate, gradually narrowed to a long, subtubulose acumen; margins plane, entire below, bistratose above the middle, double-toothed in the upper part; costa stout, percurrent to shortly excurrent, spinose at back above; upper cells quadrate or irregularly linear-rectangular, mammillose at back; basal cells narrowly rectangular, linear at the margins, thick-walled, porose; alar cells well developed, inflated, thin-walled, mostly unistratose, occasionally bistratose, with some incrassate cells between the alar region and the costa. Dioicous. Perichaetial leaves sheathing at base, with costa excurrent ending in a long hairpoint. Setae single, ca. 12 mm long, straight to straight-sinuose when dry, reddish; capsules erect, short-cylindric, symmetric, slightly curved when dry; opercula straight, long-rostrate; annuli absent; peristome teeth linear-lanceolate, divided to the middle, papillose or indistinctly papillose above, faintly vertically striolate below. Spores 20–22 µm in diameter, pale yellowish, minutely papillose.

Distribution: China, Japan, and Russian Far East.

Habitat: on bases of trees.

Orthodicranum hamulosum (Mitt.) Broth., Nat. Pflanzenfam. (ed. 2) 10: 203. 1924. Dicranum crispo-falcatum Schimp. ex Besch., Ann. Sci. Nat. Bot. sér. 7, 17: 331. 1893. Dicranum fauriei Broth. & Paris, Bull. Herb. Boissier sér. 2, 2: 920. 1902. Dicranum perindutum Card., Bull. Herb. Boissier sér. 2, 7: 715. 1907. Dicranodontium tenii Broth. & Herz., Hedwigia 65: 150. 1925. Type. China: Yunnan, Kunming, Pe Yen Tsin, alt. 3000 m, Handel-Mazzetti 36 (holotype H). Synonymized by Frahm (1997).

Dicranum hamulosum là một loài Rêu trong họ Dicranaceae. Loài này được Mitt. mô tả khoa học đầu tiên năm 1891.

多钩曲尾藓（学名：Dicranum hamulosum），又名钩叶曲尾藓，为曲尾藓科曲尾藓属下的一个种。