3. Myurella tenerrima(Brid.) Lindb. 柔叶小鼠尾藓 rou-ye xiao shu-wei xian
Musci Scand. 37. 1879. Pterigynandrum tenerrimum Brid., Muscol. Recent. Suppl. 4: 132. 1819 . Type. Southern Switzerland: “in Helvetiae montibus.”
Hypnum moniliforme Wahlenb. var. apiculatum Somm., Fl. Lapp. Suppl. 62. 1826. Isothecium apiculatum (Somm.) Hüb., Muscol. Germ. 598. 1833.
Plants green or light green, weakly glossy, loosely caespitose . Stems creeping, slender, julaceous; irregularly branched, often curved, with rhizoids at base. Leaves imbricate, cochleariform, concave, ca. 0.6 mm × 0.3 mm, broadly ovate, long or shortly lanceolate, often curved at apex; margins incurved, serrate; costa absent or with inconspicuous single costa or short forked costae; leaf cells short and broad, hexagonal, ca. 9–10 µm in diameter, irregularly shaped at lower part; alar cells quadrate or rectangular, slightly thick-walled, each cell with a single gross papilla on the back. Perichaetial leaves widely lanceolate, sheathing at base, yellowish brown, serrate above. Setae 1.0–1.5 cm long, reddish brown; capsules erect, obovoid or shortly cylindrical; annuli consisting of 2 rings of cells, deciduous. Spores 12–16 µm in diameter, finely papillose.