蔓枝藓科 man zhi xian ke
by Wang Mei-zhi
Plants extensively elongate, yellowish green to brown, rather stiff, in large mats, often pendulous. Primary stems creeping or pendulous, to 15–20 cm long; secondary stems densely 2–3-pinnately branched, with branch tips incurved when dry, erect when moist. Stem leaves loose, usually deciduous or reduced as scale-like leaves, ovate-lanceolate, shortly to long-acuminate, often secund; branch leaves dense; erect, oblong-ovate, 1.2–1.6 mm × 0.3–0.6 mm, abruptly acute or apiculate at the apex, usually plicate; margins sometimes recurved below, slightly decurrent at the base; costae extending just above mid-leaf; upper leaf cells narrowly oblong-oval, 17–35 µm × 2.5–7.5 µm, coarsely papillose in rows, rather thick-walled; median cells elongate, 25–60 µm × 2–5 µm, coarsely papillose, occasionally porose; basal marginal cells shortly rectangular, 12–17 µm × 10–12 µm, smooth; alar cells slightly enlarged. Dioicous. Perichaetial leaves oblong-lanceolate; costae ending in the leaf apices; cells sparsely papillose. Setae very short, ca. 1 mm long; capsules globose, immersed, reddish brown, smooth; opercula shortly conic-rostrate; annuli not developed; peristome single with the teeth variously reduced, short, smooth. Calyptrae small. Spores spherical, multicellular, sometimes endosporic, 8–13 µm in diameter, finely or coarsely papillose.