10. Plagiothecium nemorale (Mitt.) A. Jaeger 垂蒴棉藓 chui shuo mian xian
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876–77: 451. 1878. Plagiothecium sylvaticum var. nemorale (Mitt.) Paris, Index Bryol. 967. 1898. Stereodon nemoralis Mitt., J. Proc. Linn. Soc., Bot., Suppl. 2: 104. 1859. Type: India (Sikkim).
Plagiothecium longisetum Lindb., Contr. Fl. Crypt. As. 10: 232. 1872.
Plagiothecium neglectum Mönk., Laubm. Eur. 866. 1927. Plagiothecium sylvaticum var. neglectum (Mönk.) F. Koppe, Abh. Ber. Naturwiss. Abt. Grenzmark. Ges. Erforsch. Heimat Schneidemuhl. 1931: 80. 1931.
Plagiothecium sylvaticum auct. non. (Brid.) Schimp. in B.S.G., Bryol. Eur. 5: 192. 1852.
Plants medium-sized, dark green or yellowish green, not or somewhat glossy, in dense or loose mats. Stems complanate, irregularly branched, with ascending branches, rarely prostrate, 1.5–3.0 cm long, 5 mm wide with leaves; central strand developed. All leaves strongly contorted when young, sometimes plane, broadly ovate-lanceolate, 2.4–3.5 mm × 1.1–1.6 mm, mostly symmetric, more or less concave, abruptly acute; margins plane, nearly entire or minutely serrulate near the apex; costae double, often reaching the mid-leaf or slightly above; median leaf cells elongate-rhombic to linear-rhomboidal, 60–100 µm × 15–25 µm, thin-walled; apical cells shorter, broader; basal cells significantly broader; alar regions narrowly decurrent, consisting of rectangular or linear cells. Brood bodies often present at leaf apex. Dioicous. Perichaetial leaves shortly ovate-lanceolate, ca. 1.5 mm long, sheathing at base. Setae 15–40 mm long, reddish below, brownish above; capsules cylindrical, inclined or horizontal, often curved, smooth when dry, 2.0–2.5 mm long; opercula conic-rostrate with a short beak; annuli well developed; cilia 2–3, nodulose. Spores 10–15 µm in diameter, minutely papillose.