2. Haplohymenium longinerve(Broth.) Broth. 长肋多枝藓 chang-le duo-zhi xian
Nat. Pflanzenfam. I(3): 986. 1907. Anomodon longinerve Broth., Hedwigia 39: 243. 1899. Type. Japan: Shikoku, Kochi, Makino s.n.
Haplohymenium longinerve fo. piliferum (Broth. & Yas) Nog., Kumamoto J. Sci., Sect. 2, Biol. 3: 30. 1957. Haplohymenium piliferum Broth. & Yas., Öfver. Förh. Finska Vetensk.-Soc. 62A(9): 33. 1921.
Haplohymenium spinosum Nog., J. Jap. Bot. 13: 789. 3. 1937.
Plants slender, yellowish green or dark green, becoming yellowish brown or brown when old, in loose mats. Stems creeping, up to more than 5 cm long, irregularly pinnately branched; branches sparse, flagelliform; central strand absent. Stem leaves and branch leaves differentiated; stem leaves widely ovate, suddenly narrowed to an acuminate subula, ca. 0.3–0.6 mm long; margins plane; costa ending only a few cells below the apex; median leaf cells rounded hexagonal, ca. 8–15 µm wide, thick-walled, with a single sharp papilla at the middle of each cell; basal median leaf cells oblong, smooth; branch leaves widely ovate, gradually narrowed into a wide acumen; costa ending above the leaf middle; leaf cells rounded hexagonal, with a single setulose papilla or multipapillose. Dioicous. Perichaetial leaves ovate lanceolate, up to 2 mm long. Setae yellowish brown or reddish brown, 1.5–2.0 mm long; capsules and peristome similar to those of H. triste. Calyptrae cucullate, with a few erect hairs. Spores ca. 20–30 µm in diameter, densely minutely papillose.