32. Fissidens longisetus Griff., Calcutta Journal of Natural History and Miscellany of the Arts and Sciences in India. 2:503. 1842.
Plants small to medium-sized. Leafy stems 0.5–1.5 cm long, rather laxly to densely foliated. Leaves up to 20 pairs, narrowly elliptical to lanceolate, 1.7–2. 5 mm × 0.4–0.6 mm, acute to acuminate at apex; costa and border usually fusing together distinctly into rather long acuminate apex; leaf base usually not decurrent; limbidia very distinct throughout, usually reaching the insertion, 9–18(–22.5) µm wide, usually 3 cells thick in cross-sections; laminal cells (4.5–) 6–10.5(–12) µm long, 4.5–7.5 (–9.0) µm wide. Archegonia terminal on stems, or on short axillary shoots, 300–320 µm long; antheridia in axillary buds and also terminal on stems, 120–170 µm long; terminal perichaetial leaves 2.1–2.7 mm long, lateral ones usually shorter. Setae 2.5–5.0(–10.0) mm long; capsules erect to slightly oblique, 0.5–1.1 mm long, 0.25–0.40 mm wide; opercula conic rostrate, 0.4 mm long; peristome teeth 36–51 µm wide at the base. Spores 8–15 µm in diameter.
Neotype. India: Assam, Shillong, 1375 m alt., April 6, 1965, Iwatsuki & Sharp 6929 (NICH).
Chinese specimen examined: XIZANG (Tibet): Mo-tou Co., Miri, 1050 m, Y.-G. Su 3183 (HKAS, NICH).
Habitat: on rocks; Distribution: China, Nepal, and India.
Illustration: Pl. 85, figs. 1–23.