28. Fissidens javanicus Dozy & Molk. 爪哇凤尾藓 zhao-wa feng-wei xian
Bryol. Jav. 1: 11. 1855. Type. Indonesia: Java, Teysmann s.n.
Plants green, yellowish green to brownish. Leafy stems simple, but usually with innovations from the axils of upper leaves, 8–18 mm long, 2.3–4.0 mm wide; axillary hyaline nodules well developed; central strand only slightly differentiated. Leaves in 18–38 pairs, densely arranged; middle to upper leaves linear-lanceolate to lanceolate, 2.0–2.7 mm × 0.30–45 mm, acuminate at apex, the upper half of leaves usually more or less rugose; base of dorsal laminae often rounded; vaginant laminae ca. 1¤2 the leaf length, upper part equal to somewhat unequal; costa stout, slightly excurrent; margins crenulate; margins of apical and dorsal laminae forming a thick band 2–3 cells wide and 2–3 cells thick; margins of vaginant laminae forming a thinner band 2–3 cells wide and 1 cell thick; cells of apical and dorsal laminae subisodiametric, 7–9 µm wide, thick-walled, mammillose; cells of vaginant laminae similar to those of apical and dorsal laminae, but slightly larger and well demarcated with thicker cell walls. Sporophytes not seen.