裸萼凤尾藓

Plants small to medium-sized, yellowish green to light brownish. Leafy stems usually unbranched, sometimes with a few branches at the base, 7–16 mm long, 1.8–3.6 mm wide; axillary hyaline nodules lacking; central strand only slightly differentiated. Leaves in 9–25 pairs, rather densely arranged, distinctly crisped when dry; the lowermost leaves smaller, becoming larger toward to the middle; middle and upper leaves lingulate to lanceolate, 1.8–2.1 mm × 0.3–0.5 mm, mucronate to acute at apex; base of dorsal laminae rounded to wedge-shaped; vaginant laminae 1/2 –3/5 the leaf length, unequal; costa stout, usually ending a few cells below leaf apex; margins crenulate to slightly serrulate; cells at the apex rounded-rhombic, smooth and thick-walled, forming a lighter region; cells of apical and dorsal laminae hexagonal to rounded-hexagonal, 10–14 µm long, mammillose, obscure; cells of vaginant laminae hexagonal, with thicker and clearer walls. Phyllodioicous. Archegonia terminal, about 470 µm long. Perichaetial leaves not well differentiated. Setae ca. 2.3 mm long, reddish brown; capsules erect, symmetrical; urns cylindrical, ca. 1.1 mm long.

Type. Japan: Honshu, Sengantoge, 18 XI 1894, U. Faurie 14967 (isotype H-BR).

Chinese specimens examined: ANHUI: Huang Shan (Mt.), D.-K. Li 2406 (SHM, SYS). FUJIAN: Wuyi Shan (Mt.), D.-K. Li 9076 (SHM, SYS). GUANGDONG: Lofu Shan (Mt.), Magill et al. 8121 (MO); Shi-xing Co., P.-J. Lin & Y.-Y. Yang 4778 (IBSC, SYS). GUANGXI: Gui-lin City, T. Cao 21918 (IFSBH, SYS). GUIZHOU: Fan-jing Shan (Mt.), C. Gao & J.-Y. Feng 31976 (IFSBH, SYS); Sui-yang Co., C. Gao & J.-Y. Feng 33236 (IFSB, SYS). HAINAN: Jian-feng-ling (Mt.), P.-C. Chen et al. 144a (PE, SYS); Ling-shui Co., Redfearn et al. 36138 (MO). HUBEI: Da-sheng-nong-jia, T. Cao 33924 (IFSBH, SYS). JILIN: C. Gao 1597 (IFSBH, SYS). SHAANXI: Hua Shan (Mt.), D.-K. Li 15133 (SHM, SYS). SHANGDONG: Kun-yu Shan (Mt.), C. Gao & E.-Z. Bai 34433 (IFSBH, SYS); Lao-shan (Mt.), C. Gao & E.-Z. Bai 34231 (IFSBH, SYS); Tai-shan (Mt.), C. Gao & E.-Z. Bi 34092 (IFSBH, SYS). SICHUAN: Du-kou Co., M.-Z. Wang 20051 (PE, SYS); Liang-shan (Mt.), G.-C. Zhang & T. Cao 21867 (IFSBH, SYS). YUNNAN: Gong-shan Co., M.-Z. Wang 8852 (PE, SYS); Jing-hong Co., Redfearn et al. 34259 (MO); Kun-ming City, D.-K. Li 2587 (SHM, SYS); Lu-nan Co., Koponen 37364 (H, SYS); Meng-hai Co., Magill et al. 7975 (MO); Meng-la Co., Redfearn et al. 33992 (MO); Song-ming Co., Koponen 37819 (H, SYS). ZHEJIANG: Xi-tian-mu Shan (Mt.), D.-K. Li 3763 (SHM, SYS).

Habitat: on tree trunks or on rocks, rarely on soil; Distribution: China, Korea, and Japan.

Illustrations: Pl. 79, figs. 16–21.