1. Rauiella fujisana (Par.) Reim. 东亚硬羽藓 dong-ya ying-yu xian
Hedwigia 76: 287. 1937. Thuidium fujisanum Par., Index Bryol. 1281. 1898. Thuidium cylindraceum Mitt., Trans. Linn. Soc. London, Bot., 3: 190, illeg. hom. Type. Japan: Mt. Fuji, Bisset s.n. (isotype BM).
Rauia bandaiensis (Broth. & Par.) Broth., Nat. Pflanzenfam. I(3): 1005. 1907. Thuidium bandaiense Broth. & Par., Bull. Herb. Boiss., ser. 2, 2: 923. 1902.
Plants small, up to 3 cm long, green or dark green above, brownish green below, in thin interwoven patches. Stems creeping, regularly pinnately branched; branches ca. 5 mm long; central strand absent; paraphyllia dense, filamentous or foliose, often branched. Stem leaves appressed when dry, erect-patent when moist, triangular to triangularly ovate at base, less than l mm long, 0.5 mm wide, concave, gradually or suddenly narrowed to a short, lanceolate acumen; margins entire or serrate; costa extending to upper portion of leaf, spinosely papillose on the back; median leaf cells rectangular to nearly quadrate, ca. 12 µm × 9 µm, thick-walled, 2–6 papillae per cell, apical leaf cell linear, smooth; branch leaves ovate to triangularly ovate, gradually narrowed from a sheathing base to lanceolate apex; margins revolute, serrulate, papillose; costa slightly excurrent; median leaf cells linear, ca. 50 µm × 5 µm, smooth. Setae slender; capsules cylindrical, horizontal; peristome features the same as those described in the generic description.