3. Regmatodon orthostegius Mont. 多蒴异齿藓 duo shuo yi chi xian
Ann. Sci. Nat. Bot., ser. 2, 17: 248. 1842. Type. India: Nilgiris, Perrottet s.n.
Regmatodon polycarpus (Griff.) Mitt., J. Proc. Linn. Soc., Bot., Suppl. 1: 127. 1859. Anhyenium polycarpus Griff., Calcutta J. Nat. Hist. 3: 275. Pl. 16. 1843 [1842].
Regmatodon handelii Broth., Akad. Wiss. Wien Sitzungsber., Math.-Naturwiss. Kl., Abt. 1, 133: 578. 1924. Type. China: Yunnan, Yunanfu (Kunming), Handel-Mazzetti 260 (holotype H).
Plants rigid, about 2 cm long, yellowish green above, greenish brown below, in dense tufts. Primary stems creeping, irregularly branched; branches unequal in length, rounded, tips slightly curved. Leaves ovate, 0.8–1.1 mm × 0.3–0.4 mm, acuminate, with short apices; leaf margins slightly recurved, entire; costa single, strong, slightly short, ending at middle of leaf; leaf cells thick-walled; upper and median cells rhomboidal or round-quadrate, 13–15 µm × 5–7 µm; one to several rows of cells near basal margins quadrate; cells along costa slightly elongate. Dioicous. Perichaetial leaves sheathing at base, piliferous upward, ca. 2.0–2.5 mm long. Setae reddish brown, smooth, erect, ca. 1.0–1.2 cm long, sometimes 2–3 setae inserted in one perichaetium; capsules cylindrical, erect; exostome teeth shortly lanceolate, 0.15 mm long, shorter than endostome segments, transversely striate; endostome segments ca. 0.3 mm long; basal membrane absent; opercula conical, obtuse. Spores spherical, ca. 30 µm in diameter, coarsely papillose.