1. Mitthyridium fasciculatum (Hook. & Grev.) Robins. 匍网藓 pu-wang xian
Phytologia 32: 433. 1975. Thyridium fasciculatum (Hook. & Grev.) Mitt., J. Linn. Soc. Bot. 10: 189. 1868. Syrrhopodon fasciculatus Hook. & Grev., Edinburgh J. Sci. 3: 225. 1825. Lectotype. Indonesia: Ternate, Dickson s.n (lectotype BM; isolectotypes E, FH, G, GL, NY). Syntype. Singapore: Wallich 2270 (syntypes BM, BR, GL, NY).
Plants robust, to 3 cm high, in low yellowish green tangles. Stems creeping; rhizoids glossy reddish brown, inconspicuous. Leaves falcate-folded when dry, spreading when wet, broadly acuminate above flaring base, 2.5–3.0 mm long, axillary hairs inconspicuous; cells of upper laminae obscure, isodiametric, densely pluripapillose abaxially, with small low papillae adaxially; leaves conspicuously bordered all around with broad band of yellowish elongate cells, border very broad at shoulders, entire proximally, sharply toothed above shoulders; cancellinae broadly truncate distally. Gemmae frequent, inconspicuous, adaxial on tip of costa. Sporophytes not seen.