Fissidens jonesii Pocs

Fissidens jonesii Bizot ex Pócs (Fig. 10) This species is characterized by mammillose cells, well developed limbidia restricted to the upper leaves of perichaetial stems, bud-like axillary perigonia and by its characteristic thin peristomes with a trellis-like ornamentation. Growing scattered on tree ferns. Peristome Distal ends slightly curved inwards when moist, undivided, thin, often broken off, teeth ±130 µm long (hard to measure), tooth base 27-35 µm wide. Ornamentation OPL thin, basal 9 cells with thin, smooth, trabeculae and lamellae with vertical lamellar ridges (Fig. 10A); more distally the lamellae become papillose; IPL basal 8 cells with thick, double, somewhat papillose trabeculae and smooth to sparsely papillose lamellae; towards the apex the teeth gradually becoming papillose (Fig. 10B 1). Filaments thin, on both OPL and IPL papillose. Sporophyte Seta 0.65-1.8 mm long, smooth to rough, not papillose; capsule cylindrical to narrowly cylindrical, 0.7-0.8 × 0.25-0.35 mm, with exothecial cell columns ± 32, the cells oblong with thick vertical walls, operculum not observed, spores variable in size, 15-26.5 µm, papillose. Description and illustration Bizot (1974: 133);Bruggeman-Nannenga (in press: 46; fig. 6).琼斯氏凤尾藓（Fissidens jonesii Bizot ex Pócs）（图10）。本种的鉴别特征为：具乳突状细胞，仅雌器苞茎的上部叶片具发达的叶缘带，具芽状腋生雄器苞，以及带有网格状纹饰的纤细蒴齿。该种散生于树蕨之上。 蒴齿：湿润时远端略向内弯曲，不分裂，质地纤细，常断裂；齿片长约±130微米（难以精准测量），齿基宽27-35微米。 纹饰：外蒴齿层（Outer Peristomial Layer，OPL）纤细，基部9个细胞具薄而平滑的小梁及具垂直肋片脊的肋片（图10A）；向远端的肋片逐渐变为乳突状。内蒴齿层（Inner Peristomial Layer，IPL）基部8个细胞具厚、双层且略具乳突的小梁，肋片平滑至疏被乳突；向齿尖方向，齿片逐渐变为乳突状（图10B 1）。细丝纤细，在外蒴齿层与内蒴齿层上均具乳突。 孢子体：蒴柄长0.65-1.8毫米，平滑至粗糙，无乳突；孢蒴呈圆柱形至狭圆柱形，大小为0.7-0.8 × 0.25-0.35毫米，具约±32列外壁细胞，细胞呈长圆形，垂周壁增厚；未观察到蒴盖；孢子大小不一，直径15-26.5微米，具乳突。 描述与插图：Bizot（1974：133）；Bruggeman-Nannenga（即将出版：46；图6）。