5. Trichostomum platyphyllum (Ihs.) P.-C. Chen 阔叶毛口藓 kuo-ye mao-kou xian
Hedwigia 80: 166. 1941. Tortella platyphylla Broth. ex Ihs., Cat. Mosses Japan 65. 1929. Type. Japan: Rikusen, E. Uematsu 807.
Hyophila angustifolia Card., Beih. Bot. Centralbl. 19(2): 101. 6. 1905, hom. illeg.
Hyophila subspathulata Sak., Bot. Mag. (Tokyo) 67: 41. 1954.
Trichostomum stenophyllum (Card.) X.-J. Li & Iwats., Hikobia 12: 35. 1996, hom. illeg. Hyophila stenophylla Card., Bull. Herb. Boissier, sér. 2, 8: 332. 1908. Type. China: Taiwan, Kushaku, Faurie 148.
Weisiopsis hyophilioides Dix. & Thér., Rev. Bryol. Lichénol. 13: 11. 1942. Type. China: Taiwan, Sinchiku, Simada, Sasaoka 3853.
Plants small, to 12 mm high, dark green or reddish brown, in dense tufts. Stems erect, usually irregularly branched, densely foliate. Leaves contorted-curved to crisped when dry, erecto-patent when moist, ovate-lanceolate or narrowly ligulate, broadly acute, upper lamina sometimes keeled; margins entire, usually plane; costa stout, percurrent or ending below apex; upper leaf cells rounded-hexagonal, thick-walled, green and obscure, each cell with several large, circular papillae on both surfaces; basal cells slightly elongate, irregularly short-rectangular, smooth, hyaline. Autoicous. Setae 5–7 mm long, yellowish; capsules erect, oblong-ellipsoidal; peristome teeth short, linear, undivided, papillose.