1a. Hymenostylium recurvirostrum (Hedw.) Dixon var. recurvirostrum 立膜藓原变种 li-mo xian yuan bian-zhong
Rev. Bryol. Lichénol. 6: 96. 1934. Gymnostomum recurvirostrum Hedw., Sp. Musc. Frond. 33. 1801. Type. Europe.
Amphidium mougeotii (Bruch & Schimp.) Schimp. var. formosicum Cardot, Beih. Bot. Centralbl. 19 (2): 104. 1905.
Gymnostomum curvirostrum Hedw. ex Brid., J. Bot. (Schrader). 1800(1): 273. 1801, nom. illeg.
Hymenostylium anoectangioides (Müll. Hal.) Broth., Nat. Pflanzenfam. I(3): 389. 1902. Trichostomum anoectangioides Müll. Hal., Nuovo Giorn. Bot. Ital., n. ser. 4: 252. 1897. Type. China: Shaanxi (Schen-si), Lao-y-san, Nov. 1895, P. J. Giraldi s.n.
Hymenostylium curvirostrum Mitt., J. Proc. Linn. Soc., Bot., Suppl. 1: 32. 1859, nom. illeg.
Hymenostylium curvirostrum var. sinense Cardot & Thér., Bull. Acad. Int. Géogr. Bot. 19: 18. 1909.
Hymenostylium pellucidum Broth. & Yasuda, Rev. Bryol. 53: 1. 1926. China: Taiwan, Mt. Vôkô, Yasuda s.n.
Plants medium-sized, usually to 30 mm high, sometimes larger, in dense tufts. Stems erect, often branched. Leaves appressed when dry, erect-spreading when moist, lanceolate, acuminate at the apex; costa stout, percurrent, highly papillose on the back of costa; margins entire, but appearing to be serrulate due to papillose marginal cells; upper leaf cells rounded hexagonal to rounded-quadrate, thick-walled, pluripapillose; basal cells irregularly rectangular, smooth. Sporophytes not seen.