9. Rhynchostegiella (Schimp.) Limpr. 细喙藓属 xi hui xian shu
Laubm. Deutschl. 3: 207. 1896. Rhynchostegium subgen. Rhynchostegiella Schimp. in B.S.G., Bryol. Eur. 5: 201. 1852.
Plants slender, soft, green or yellowish green, glossy, in loose mats. Stems prostrate, elongate, often with rhizoids, irregularly or subpinnately branched; branches short, densely foliate, usually complanate. Stem and branch leaves similar or dimorphic; stem leaves oblong-lanceolate or ovate-lanceolate, slightly concave; margins entire or serrulate above; costae single, variable in length, ending below mid-leaf to nearly percurrent; median leaf cells linear; alar cells differentiated, sometimes weakly so, quadrate to shortly rectangular; branch leaves lanceolate to narrowly lanceolate. Autoicous. Perichaetial leaves narrowly lanceolate, slenderly acuminate to piliform toward apex, sometimes reflexed. Setae elongate, reddish, twisted; capsules suberect to horizontal, ovoid to elongate-ovoid; opercula conic, long rostrate; peristome double; exostome teeth cross-striolate at base, smooth or papillose above, trabeculate on ventral surface; endostome segments linear-lanceolate, perforate; basal membrane high; cilia nodulose. Spores unknown.