4. Calliergonella Loeske 大湿原藓属 da shi yuan xian shu
Hedwigia 50: 248. 1911. Calliergon sect. Calliergonella (Loeske) Mönk., Laubm. Eur. 744. 1927.
Calliergidium Grout, Moss Fl. N. Amer. 3: 100. 1931.
Plants robust, green or yellowish green, glossy, in loose mats. Stems prostrate, subpinnately branched; stem elliptical in cross section; cortical cells hyaline, inflated, central strand present; pseudoparaphyllia large, foliose. Stem leaves ascending, broadly elongate-ovate or falcate-lanceolate, somewhat narrowed, decurrent at base, shortly acuminate or obtuse at apex; margins entire or serrate; costae short, double, or absent; median leaf cells linear; alar cells abruptly enlarged, numerous, inflated, thin-walled, usually hyaline or often colored, forming a distinct, decurrent auricle at base. Dioicous. Inner perichaetial leaves erect, broadly lanceolate, plicate, costae absent. Setae slender, purple-red; capsules horizontal, cylindrical, curved when dry or after dissemination; annuli differentiated; cilia 2–4. Spores large, finely papillose.