3. Chionostomum C. Müll. 花锦藓属 hua jin xian shu
Linnaea 36: 21. 1869.
Plants rather robust or soft, pale green, yellowish green or yellowish brown, glossy, in interwoven patches. Stems elongate, prostrate, with dense rhizoids at base; somewhat irregularly pinnately branched; branches erect, blunt at apex, short and unbranched, or elongate and remotely branched. Leaves dense, loosely appressed when dry, erect or erect-spreading when moist, sometimes slightly falcate, elongate-oblong, spatulately concave, shortly lanceolate at apex; leaf margins slightly recurved, entire; costae double, short or very weak; leaf cells smooth, rhomboidal above, becoming longer and thinner below; basal cells shorter, pitted, golden yellowish; alar region consisting of one row of inflated, hyaline or yellowish brown cells with a few smaller and subquadrate cells above the inflated cells. Autoicous. Inner perichaetial leaves erect, lanceolate, margins recurved, smooth. Setae slender, elongate, reddish, smooth; capsules erect or slightly suberect, elongated cylindrical; opercula conic at base, slender and long-rostrate; exostome teeth evidently bordered at margins, densely trabeculate on inner surface; endostome segments adhering to exostome teeth, linear, as long as the teeth, papillose; basal membrane low; cilia absent. Calyptrae cucullate, smooth. Spores small.