1. Leptodontium flexifolium (Dicks.) Hampe ex Lindb. 厚壁薄齿藓 hou-bi bo-chi xian
Ö fvers. Förh. Kongl. Svenska Vetensk.-Akad. 21: 227. 1864. Bryum flexifolium Dicks., Fasc. Pl. Crypt. Brit. 4: 29. 1801. Type. Europe.
Bryoerythrophyllum dentatum (Mitt.) P.C. Chen, Hedwigia 80: 253. 1941. Didymodon dentatus Mitt., J. Proc. Linn. Soc., Bot., Suppl. 1: 23. 1859.
Bryoerythrophyllum pergemmascens (Broth.) P.C. Chen, Hedwigia 80: 261. 1941. Leptodontium pergemmascens Broth., Akad. Wiss. Wien Sitzungsber., Math.-Naturwiss. Kl., Abt. 1: 133. 565. 1924.
Bryoerythrophyllum yichunense C. Gao, Fl. Musc. Chin. Boreali-Orient. 379. f. 80. 1977, syn. nov. Type. China: Heilongjiang, Yi-chuan Co., P.-C. Chen & C. Gao 346 (holotype IFSBH).
Leptodontium gracillimum Nog., J. Jap. Bot. 20: 142. 1945.
Leptodontium nakaii Okamura, J. Coll. Sci. Imp. Univ. Tokyo 36(7): 9. 5 A–H. 1915.
Leptodontium warnstorfii M. Fleisch., Musci Buitenzorg 1: 364, f. 67. 1904.
Plants small, thick, to 20 mm high, yellowish green, scattered or in loose tufts. Stems erect, simple or branched, densely foliate, sparsely radiculose at base. Leaves erect to somewhat involute when dry, erect- to wide-spreading when moist, oblong-ovate, 1.2–1.8 mm × 0.3–0.5 mm, obtusely pointed to broadly acute; margins entire, recurved in the lower half, irregularly loosely dentate in the upper half; costa slender, ending just below the apex; upper leaf cells rounded-hexagonal, 10–14 µm × 8–12 µm, strongly thick-walled, with several simple papillae; basal cells irregularly to linear-rectangular, 30–55 µm × 10–20 µm, thin-walled, smooth, hyaline. Sporophytes unknown.