1. Dichelyma falcatum (Hedw.) Myrin 网齿弯刀藓 wang chi wan dao xian
Kongl. Ventensk. Acad. Handl. 1832: 274. 1833. Histriomitrium falcatum (Hedw.) Sendtn., Bryol. Siles. 278. 1869. Neckera falcata (Hedw.) Müll. Hal., Syn. Musc. Frond. 2: 143. 1850. Fontinalis falcata Hedw., Sp. Musc. Frond. 299. 1801. Type: Europe.
Plants rather large, elongate, yellowish green, dark green when old, in loose tufts. Stems to 5 cm long, irregularly branched or dichotomously branched. Stem and branch leaves similar, oblong-ovate at the base, 3–5 mm long, keeled, mostly falcate, acuminate at the apex, constricted at the base; margins serrulate at the apex; costae often percurrent or excurrent; apical leaf cells oblong-ovate to rhomboidal, prorate; median cells sublinear, thin-walled; basal cells slightly yellow, shortly rectangular to subquadrate, strongly thick-walled. Dioicous. Perichaetial leaves to 6 mm long. Setae 10–15 mm long; capsules ovoid-cylindrical, exserted; opercula conic, obliquely rostrate; peristome double, yellowish brown; exostome teeth densely spinulosely papillose; endostome segments joined together as a trellis-like cone, densely papillose. Spores spherical, 12–14 µm in diameter, nearly smooth or finely papillose.