48. Fissidens taxifolius Hedw. 鳞叶凤尾藓 lin-ye feng-wei xian
Sp. Musc. Frond. 155, pl. 39, f. 1–5. 1801. Type. Europe.
Fissidens sylvaticus Griff., Calcutta J. Nat. Hist. 2: 507. 1842.
Plants medium-sized, growing in dense tufts. Leafy stems simple, occasionally branched, 4.5–16.0 mm long, 2.0–4.6 mm wide; axillary hyaline nodules not developed; cortical stem-cells small and thick-walled, central strand not well developed. Leaves in 6–17 pairs, more or less overlapping, middle to upper leaves ovate-lanceolate, 1.6–3.3 mm × 0.5–0.8 mm, acute to mucronate at apex; base of dorsal laminae usually rounded, sometimes broadly wedge-shaped; vaginant laminae 1/2–3/5 the leaf length, slightly unequal; costa stout, percurrent to shortly excurrent; margins serrulate; cells of apical and dorsal laminae rounded-hexagonal to hexagonal, 7–11 µm long, thin-walled, mammillose, obscure; cells of vaginant laminae similar to those of apical and dorsal laminae, but with thicker walls and higher mammillae, larger toward the base near costa. Dioicous. Female inflorescences lateral. Perichaetial leaves differentiated, narrowly lanceolate, ca. 1.3 mm long. Archegonia 370–426 µm long. Setae 11–16 mm long; capsules horizontal to inclined, asymmetrical, curved, constricted below capsule mouth when dry; urns ca. 1 mm long; exothecial cells rectangular-hexagonal, with thickened longitudinal and thin transverse walls; opercula long rostrate; peristome teeth 0.56–0.63 mm long, 127–156 µm wide at base, with distinct projections on the articulations. Spores 10–18 µm in diameter.