3. Dicranodontium didictyon (Mitt.) Jaeg., Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1877–78: 380. 1880; Dicranum didictyon Mitt., J. Proc. Linn. Soc., Bot., Suppl. 1: 21. 1859.
山地青毛藓
Plants medium-sized to rather large, up to 4 cm high, yellowish brown, somewhat shiny, in dense tufts. Stems erect, or ascending, usually simple, rarely sparsely short-branched; central strand present. Leaves erect-patent to falcate-secund, often homomallous, up to 1.2 cm long, lanceolate, gradually narrowed from an oblong-ovate, somewhat sheathing and slightly auriculate base to a long, canaliculate and setaceous acumen; margins plane or slightly incurved, entire below, serrulate near the apex; costa brownish, occupying ca. 1/3 the leaf base width, long- excurrent, serrulate at back near the tips; upper cells rhomboidal to long-rectangular, a row of marginal cells shorter and broader; lower cells quadrate to rectangular, thick-walled, lax and broader close to the costa, becoming narrower and hyaline at the margins; alar cells more or less forming auricles, quadrate to irregularly hexagonal, clearly distinguished from basal cells, slightly inflated, thin-walled, fragile, hyaline or brownish. Dioicous. Perichaetial leaves not much differentiated. Setae ca. 6 mm long, straight or twisted when dry, curved or cygneous when moist, brownish; capsules ovoid, ca. 2.2 mm × 1.0 mm, reddish brown, exothecial cells 49 µm × 10 µm, vertically thick-walled; peristome teeth linear-lanceolate, divided nearly to the base, reddish brown. Spores not seen.
Syntypes. India: Sikkim, J. D. Hooker 27, 27b, 51, 51b.
Chinese specimens examined: GUANGXI: Xing-an Co., C. Gao & G.-C. Zhang s.n. (IFSBH). GUIZHOU: Jiang-kou Co., C. Gao & J.-Y. Feng 32602 (IFSBH, MO). HAINAN: Wuzhi Shan (Mt.), South China Exped. Team 2297 (IBSC, IFSBH). SICHUAN: Omei Shan (Mt.), C. Gao et al. 19300 (IFSBH); Tian-quan Co., C. Gao et al. 18359 (IFSBH). XIZANG: Ya-dong Co., S.-K. Chen 4975 (IFSBH, KUN), M. Zang 597(d) (IFSBH, KUN). YUNNAN: Da-li Co., S.-D. Zhao & Z.-F. Fang 26144 (IFSBH, MO); Kunming City, W.-X. Xu 76 (IFSBH, YUKU); Ping-bian Co., W.-M. Zhu 209 (IFSBH, YUKU).
Habitat: on soil over rocks or bases of trees; Distribution: China, Japan, India, and Myanmar.
Illustrations: Pl. 34, figs. 1–7.
