13. Rauiella Reim. 硬羽藓属 ying-yu xian shu
Hedwigia 76: 287. 1937.
Plants rather small to medium-sized, up to 3 cm long, brownish green to yellowish green, not shining, rigid when dry, in loose interwoven mats. Stems creeping, spreading, regularly pinnately branched; apex of branches caudate; central strand present; paraphyllia numerous, filamentous or foliose, often forked, apical cell multipapillose. Stem leaves and branch leaves differentiated; stem leaves ovate or cordate at base, gradually or suddenly narrowed to a lanceolate apex; margins almost entire or slightly serrulate; costa rather thick, ending at upper portion of leaf; leaf cells oblong to rounded quadrate, thick-walled, multipapillose; branch leaves ovate or ovate-triangular, with a short acute apex. Autoicous. Inner perichaetial leaves lanceolate, widely ovate at base; margins serrate, but not ciliate; laminal cells linear, smooth; costa percurrent or excurrent. Setae slender, more than 1 cm long, reddish brown or yellowish brown, smooth; capsules erect-patent or horizontal, reddish brown, oblong-ovate to cylindrical; annuli differentiated; peristome double; exostome teeth narrowly lanceolate, yellowish brown, hyaline at apex, papillose; endostome segments yellowish, finely papillose; basal membrane high, at least 1/3 the length of endostome segments; cilia 2–3, hyaline, finely papillose. Calyptrae cucullate. Spores nearly spherical, finely papillose.