1. Sasaokaea aomoriensis (Paris) Kanda 类牛角藓 lei niu jiao xian
J. Sci. Hiroshima Univ., Ser. B, Div. 2, Bot. 16: 74. 1976. Drepanocladus aomoriensis (Paris) Broth., Nat. Pflanzenfam. I(3): 1034. 1908. Hypnum aomoriense Paris, Rev. Bryol. 31: 94. 1904. Type: Japan. Ise, Ujiyamada, Y. Tsuchiga 3491.
Sasaokaea japonica Broth., Rev. Bryol., n.s., 2: 10. 1929. Type: Japan. Hitachi, Pref. Ibaragi, Sasaoka 5363.
Drepanocladus japonicus Dixon, Bot. Mag. (Tokyo) 50: 149. 1936.
Plants rather robust, yellowish green, somewhat glossy, in loosely caespitose mats. Stems prostrate, to 10–20 cm long, pinnately or subpinnately branched; central strand weakly differentiated; paraphyllia abundant on stems, filiform, branched, often extending to the margins of leaf bases; pseudoparaphyllia small, foliose. Stem and branch leaves similar, ovate-lanceolate or cordate-ovate, 3.0–4.0 mm × 1.0–1.5 mm, shortly acuminate or sometimes obtuse at apex, slightly concave; margins entire below, serrulate at apex; costae strong, 30–40 mm wide at base, reaching 3/4 the leaf length; median leaf cells linear, 30–120 mm × 3–8 mm, slightly prorate; basal cells sometimes thick-walled, slightly porose; alar cells barely differentiated. Sporophytes not seen.