长叶拟白发藓

Plants medium-sized to large, up to 5(–8) cm high, green or yellowish green, with a grayish sheen when dry, in compact tufts. Stems erect or ascending, simple or branched, somewhat radiculose at base. Leaves 4–8 mm long, usually strongly falcate-secund, sometimes stiffly erect or fragile, linear-lanceolate, gradually narrowed to a subtubulose apex; margins plane below, slightly involute and serrulate above; costa broad, occupying ½ or more the leaf base width, filling nearly all of the subula, excurrent, 2–4 layers of thick-walled cells in transverse section, with the dorsal rows of green cells interspreading among the hyaline cells, forming longitudinal striations; laminal cells at the shoulder, elongate-rectangular to linear, sometimes porose; alar cells inflated, hyaline or brownish, usually extending close to the costa; asexual reproduction sometimes by means of fragile leaves. Setae straight, up to 1.5 cm long, reddish brown, twisted clockwise when dry; capsules erect, oblong-cylindric, 1–3 mm long, reddish brown to dark brown, irregularly furrowed when dry or empty; opercula long-rostrate, nearly as long as or slightly shorter than the urns; annuli none; stomata present; peristome teeth divided, ca. halfway down, reddish or brownish, usually perforate below, obliquely to vertically striolate to the apex. Spores 25–34 µm in diameter, finely papillose.

Type. Europe.

Chinese specimens examined: HEILONGJIANG: Hai-lin Co., C. Gao 9154 (IFSBH), C. Gao & G.-C. Zhang 9137 (IFSBH). JILIN: An-tuo Co., C. Gao 1048, 1054 (IFSBH); Chang-bai Co., C. Gao 7531 (IFSBH). SHAANXI: Taibai Shan (Mt.), Z.-P. Wei 5424 (IFSBH). SICHUAN: A-ba Co., S. He 31063 (MO, PE); Li Co., Allen 6844 (MO); Ma-er-kang Co., S. He 31173 (MO, PE); Mu-li Co., C. Gao 20402 (IFSBH); Tian-quan Co., C. Gao 17903 (IFSBH), S. He 32022a (MO, PE); Xiang-cheng Co., S. He 31757 (MO, PE). XIZANG: Cha-yu Co., M.-Z. Wang 8435a (IFSBH, KUN); Long-zi Co., M. Zang 901 (IFSBH, KUN); Ya-dong Co., M. Zang 698, 715a (IFSBH, KUN). YUNNAN: Fu-gong Co., M.-Z. Wang 6754b (IFSBH, PE); Gong-shan Co., M.-Z. Wang 9434 (a-3) (IFSBH, PE), H.-G. Guo 20 (IFSBH, KUN); Li-jiang Co., W.-X. Xu 191 (IFSBH, YUKU).

Habitat: on rotten logs, tree bases or rocks, rarely on soil; Distribution: China, India, Japan, Russia, Europe, and North America.

Illustrations: C. Gao (ed.) 1994 (Pl. 86, figs. 1–9).