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Moss China | Family List | Moss China V. 1 | Dicranaceae | Dicranum

18. Dicranum majus Smith, Fl. Brit. 1202. 1804.


Dicranum scoparium Hedw. var. majus (Turn.) Wahlenb., Fl. Carpat. Princ. 343. 1815. Dicranum delavayi Besch., Rev. Bryol. 18: 88. 1891, syn. nov. Type. China: Yunnan, between Ho-kin and Ta-li (Da-li), Delavay 1867 (holotype BM).

Plants large to robust, 5–8(–13) cm high, green or yellowish green, shiny, in loose tufts. Stems erect, or ascending, often branched, densely tomentose below. Leaves in several rows, falcate-secund when dry, erect-spreading when moist, lanceolate, 9–12 mm long, gradually narrowed to a long, subulate acumen; margins plane below, slightly incurved above, double-toothed above the middle; costa slender to rather stout, occupying ca. 1/10 – 1/5 the leaf base width, shortly excurrent, ending in a short hairpoint, serrate or ridged at back above; upper cells elongate, rectangular, incrassate, porose; basal cells long-rectangular, thick-walled, strongly porose, becoming more elongate at the margins; alar cells quadrate to short-rectangular, inflated, bi- to tristratose, pale brownish at the margins, hyaline within. Dioicous. Male plants dwarfed, located at the base of females. Perichaetial leaves sheathing at base, abruptly narrowed to a short hairpoint. Setae aggregated, 1–4 per perichaetium, 2.5–3.5 cm long, yellowish to yellowish brown, becoming reddish brown with age; capsules cylindric, 2–3 mm long, curved, inclined to horizontal, yellowish green to brownish, smooth or furrowed when dry and empty; opercula long-rostrate, 3.0–3.5 mm long; annuli none; peristome teeth dicranoid. Spores 14–33 µm in diameter, minutely papillose.

Type. England.

Chinese specimens examined: GUANGXI: Long-sheng Co., P.-C. Wu & Y.-X. Lin 1353 (ALTA, IFSBH, PE). GUIZHOU: Jiang-kou Co., C. Gao & J.-Y. Feng 32397 (IFSBH); Leigong Shan (Mt.), S.-Z. Jiang 10298 (IFSBH). HEILONGJIANG: Hai-lin Co., C. Gao 236 (ALTA, IFSBH); Xiao Xing An Ling (Lesser Khingan Mt.), Z. Wang 4467 (ALTA, IFSBH). HUBEI: Wanshijiang Harbor, L.- J. Bi 2 (IFSBH). HUNAN: Yi-zhang Co., C. Gao 1663 (IFSBH). JILIN: An-tu Co., C. Gao 22267 (IFSBH, MO); Wang-qing Co., C. Gao 2226 (ALTA, IFSBH). NEI MONGOL: Da Xing An Ling (Greater Khingan Mt.), C. Gao 912 (IFSBH, MO), C. Gao 3365 (ALTA, IFSBH, MO). SHAANXI: Taibai Shan (Mt.), Z.-P. Wei 6156 (ALTA, IFSBH). SICHUAN: Ma-er-kang Co., S. He 31132 (MO, PE); Mu-li Co., C. Gao 20619 (IFSBH); Ping-wu Co., Q. Li 10336 (ALTA, IFSBH); Ya-jiang Co., S. He 31958 (MO, PE). TAIWAN: Ilan Co., C.-C. Chuang 1816 (UBC); Miao-li Co., M.-J. Lai 7671 (MO); Nan-tou Co., S. Nakausli 291 (KU); Tai-chung Co., M.-J. Lai 9981 (MO, NY). XIZANG: Bo-mi Co., W.-H. Li 76-2910 (IFSBH, KUN); Cha-yu Co., M.-Z. Wang 8269(b) (IFSBH, PE), J.-W. Zhang M7311 (IFSBH); Lin-zhi Co., S.-K. Chen 344 (ALTA, IFSBH, KUN); Lu-lang Co., S.-K. Chen 382 (ALTA, IFSBH, KUN); Mi-lin Co., S.-K. Chen 151 (IFSBH, KUN); Mo-tuo Co., Y.-G. Su 1889 (IFSBH, KUN); Ya-dong Co., S.-K. Chen 4966 (KUN). YUNNAN: Gong-shan Co., M.-Z. Wang 10836 (ALTA, IFSBH, PE); Yang-bi Co., Handel-Mazzetti 3360 (635) (H, as Dicranum delavayi).

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

Illustrations: C. Gao (ed.) 1994 (Pl. 123, figs. 1–7).


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