1. Exostratum blumii (Nees ex Hampe) L. T. Ellis 拟外网藓 ni wai-wang xian
Lindbergia 11: 25. 1985. Syrrhopodon blumii Nees ex Hampe, Bot. Zeitung. 5: 921. 1874. Leucophanes blumii (Hampe) C. Müll., Syn. Musc. Frond. 2: 537. 1851. Octoblepharum blumii (Hampe) Mitt., J. Linn. Soc. Bot. 10: 179. 1868. Exodictyon blumii (Hampe) Fleisch., Musci Frond. Archipelagi Indici, sér. 2, exs. no. 58. 1899. Type. Indonesia: Java, C. L. Blume s.n.
Plants soft, to 1.5 cm high, whitish green, in dense tufts. Stems erect, sparsely branched. Leaves in three obscure ranks, 3–4 mm long, erect to slightly reflexed from the middle leaf, sheathing at base, gradually narrowed to linear-lanceolate subula; costa thick and broad, reaching to the blunt leaf apex, filling almost the entire subula, strongly convex on the abaxial side, slightly concave on the adaxial side, papillose on both sides; basal leaf margins around shoulders often recurved; at shoulders hyaline laminal cells linear, chlorocysts forming cilia, in subula hyaline cells only 1–2 rows on each side of costa or filling the entire costa, superficial chlorocysts strongly conical-mammillate, spinulose projections often to 15–20 µm long, leaf appearing scabrous. Sporophytes not seen, reported to be the same as described under the genus.