5. Distichophyllum maibarae Besch. 东亚黄藓 dong-ya huang xian
J. Bot. (Morot) 13: 40. 1899. Type. Japan: Maibara, Faurie 11130 (isotype FH).
Distichophyllum duongii T. Ninh, Acta Bot. Acad. Sci. Hung. 27: 154. 1981.
Distichophyllum stillicidiorum Broth., Akad. Wiss. Wien Sitzungsber., Math.-Naturwiss. Kl., Abt. 1, 131: 217. 1923. Type. China: Hunan, Yolu-shan, near Tschangscha, Handel-Mazzetti 11489 (holotype H).
Plants variable in size, in dense tufts. Stem leaves slightly contracted to moderately undulate when dry, broadly ovate-oblong, 1.0–2.0(–2.6) mm × 0.8–1.0(–3.5) mm; lateral and terminal leaves larger, oblong to shortly spathulate; leaf apices roundly apiculate, acute to shortly acuminate, entire, with very obscure teeth at leaf tips owing to the end walls of border cells, the acumens small, mostly less than 50 µm long; leaf margins plane, with narrowly differentiated borders consisting of 1–3 rows of linear cells; median laminal cells homogeneously quadrate to round-hexagonal, 16–34 µm × 11–16(–23) µm, thin-walled, slightly or not collenchymatous, becoming rectangular at leaf base; apical leaf cells more uniformly hexagonal, 11–18(–23) µm × 11–13(–18) µm. Perichaetial leaves much smaller, 1.5 mm long, broadly ovate, somewhat long acuminate with indistinct borders. Sporophytes lateral; setae 8–9(–15) mm long, smooth, except at the base of capsule; capsules oblong-ovoid, about 1 mm long, with strongly wrinkled apophysis; exostome teeth hookerioid, with cross-lamellae. Calyptrae mitriform, with basal long hairs. Spores 8–10 µm, smooth to weakly papillose.