细叶曲尾藓

Dicranum neglectum auct. non Jur. ex De Not., Atti Reale Univ. Genova 1: 613. 1869. Dicranum muehlenbeckii var. neglectum auct. non (De Not.) Pfeff., Neue Denschr. Schweiz. Naturf. Ges. 4: 23. 1869. Dicranum spadiceum auct. non Zett., Kongl. Svenska Vetensk. Acad. Handl. 5(10): 20. 1865.

Plants medium-sized, 2–4 cm high, yellowish green or brownish green, not or somewhat shiny, in compact tufts. Stems erect or ascending, simple or branched, tomentose below. Leaves crispate when dry, erect-patent or slightly secund when moist, ovate-lanceolate, 8–10 mm × 1 mm, gradually narrowed from an oblong-ovate base to slender, or subulate, channeled acumen; margins plane below, involute above, double-toothed and bistratose in the upper part; costa stout, occupying 1/5– ¼ the leaf base width, percurrent or shortly excurrent, not particularly ridged at back, smooth or somewhat serrulate near the tips; upper cells quadrate to rounded quadrate, incrassate, not porose, somewhat mammillose at back; basal cells elongate, rectangular, thick-walled, porose; alar cells quadrate, slightly inflated, bistratose, deeply brownish. Dioicous. Male plants dwarfed. Setae single or sometimes two per perichaetium, straight, 2.5–3.0 cm long, yellowish; capsules cylindric, curved, urns ca. 3 mm long, sometimes strumose at base, more or less furrowed when dry and empty; opercula obliquely long-rostrate, ca. 2 mm long; annuli in 1 or 2 rows of large cells, deciduous; peristome teeth lanceolate, divided to the middle, reddish brown, papillose above, vertically striolate below. Spores 18–20 µm in diameter, minutely papillose.

Type. Switzerland: Mühlenbeck s.n. 1844.

Chinese specimens examined: JILIN: An-tu Co., C. Gao 1192 (ALTA, IFSBH); Changbai Co., C. Gao 7511 (IFSBH); Jiao-he Co., C. Gao 1959 (IFSBH, MO). NEI MONGOL: Da Xing An Ling (Greater Khingan Mt.), C. Gao 1948 (MO), H.-F. Xie 57 (MO). SICHUAN: Ba-tang Co., S. He 31463 (MO, PE); Li-xian Co., Z. Wang et al. 518 (IFSBH); Mu-li Co., C. Gao 20444 (MO), C. Gao et al. 20868 (IFSBH). TAIWAN: Ping-tung Co., C.-C. Chuang 57736 (NY). XIZANG: Lu-lang Co., S.-K. Chen 392 (IFSBH); Mi-lin Co., Xizang Team 7486 (IFSBH). ZHEJIANG: Xitianmu Shan (Mt.), R.-L. Hu 116(b) (HSNU, IFSBH).

Habitat: on humic soil or rocks; Distribution: China, Korea, Japan, Europe, Russia, and North America.

Illustrations: C. Gao (ed.) 1994 (Pl. 126, figs. 1–9).