3. Cyrto-hypnum fuscatum (Besch.) P.-C. Wu, Crosby & S. He 尖毛细羽藓 jian-mao xi-yu xian
Chenia 6: 10. 1999. Thuidium fuscatum Besch., Ann. Sci. Nat. Bot., ser. 7, 15: 78. 1892. Type. China: Yunnan, Santchang-Kiou, Delavay 4768 (holotype BM; isotype H).
Cyrto-hypnum talongense (Besch.) Buck & Crum, Contr. Univ. Michigan Herb. 17: 67. 1990. Thuidium talongense Besch., Ann. Sci. Nat. Bot. ser. 7, 15: 81. 1892. Type. China: Yunnan, Talong-tan, Delavay 4849d (holotype BM).
Thuidium burmense Bartr., Rev. Bryol. Lichénol. 23: 252. 1954.
Thuidium koelzii Robins., Bryologist 71: 92. 1968.
Plants slender, yellowish green, in interwoven mats. Stems creeping or ascending, regularly pinnately branched; central strand present; paraphyllia densely on stems, apical cells sharp, 3–6 cells long. Stem leaves large, remote, gradually narrowed from an ovate base to a lanceolate apex, ca. 1 mm long; margins serrate; costa ending below leaf apex; leaf cells hexagonal, unipapillose; branch leaves dense, revolute when dry, erect-patent when moist, ca. 0.35 mm long, oblong-ovate; margins serrate; costa reaching near leaf apex. Autoicous. Perichaetial leaves oblong-lanceolate, suddenly narrowed to a lanceolate apex, up to 2 mm long. Setae erect, ca. 2.5 cm long, smooth; capsules inclined to horizontal, short cylindrical; opercula conical, beaked; peristome teeth Hypnum-type; endostome segments shorter than the teeth; cilia single, short or rudimentary. Spores very small.