Jennings: Manual of Mosses 15 



split - ■ , • ^^ 



66. Cilia (none) or often present; segments carinate and often split along the 



median line! (sometimes adhering to the teeth) 76 



66. Inner peristome consisting only of a low papillose basal membrane 



Litidbergia, p. 202 



67. Segments quite rudimentary, sometimes with a distinct carinate basal mem- 

 brane; leaves smooth to usually more or less papillose "8 



67. Leaves smooth V W 



68. Leaves deltoid to round-ovate, spinulose-dentate to fimbriate; paraphyllia 



none; costa single and usually half the length of the l:af Thtltj, p. 195 



68. Leaves oval-elliptic to obovate, entire or cristate-serrate; costa double or 



short or almost lacking Pterygynandrum, p. 278 



68. Stem-leaves ovate, sub-cordate, apex abruptly long-acuminate; costa sub- 



percurrent; branch-leaves narrower Leskeella, p. 205 



69. Inner penstome lattice-like; leaf-cells narrow and prosenchymatous 70 



69. Inner peristome not lattice-like, sometimes none; segments when present free, 



sometimes rudimentary - 71 



70. Ecostate; capsule immersed; plants aquatic Fontinalis, p. 173 



70. Costate; capsule more or less exserted; plants growing on the base of 



bushes and shrjbs Dkhelyma, p. 178 



71. Leaves complanate, more or less transversely undulate Neckera, p. 187 



71. Leaves more or less spreading, not transversely undulate 72 



72. Inner peristome none, or, if present, the linear segments without a basal 

 membrane; teeth flat, thin, distantly articulated, approximate in pairs; 



costa simple, often delicate and short, or none 73 



72. Inner peristome lacking or the peristome double; basal membrane low 74 



73. Costa mostly delicate and short; teeth approximate in pairs, broad and obtuse; 



leaves serrate to ciliate-dentate Fabronia, p. 279 



73. Costa strong, ending above the middle of the leaf; peristome deeply inserted; 

 teeth broadly lanceolate; segments shorter than the teeth, linear, almost 



smooth Anacamptodon, p. 280 



74. Calyptra cucullate; capsule exserted; segments of inner peristome rudi- 

 mentary and narrow or none or adhering to inner surface of teeth 75 



74. Calyptra conical-campanulate; capsule immersed; segents linear or very 



narrow-carinate (Cryphaea) 



75. Ecostate Leucodon, p. 183 



75. Costate Leptodon, p. 185 



76. Leaves mostly rough-papillose. {Bryhnia spp. and Isopterygium geophilum 



are papillose dorsally by projecting angles of cell-walls) 77 



76. Leaves smooth (see also Helodium) , or sometimes slightly papillose at the 



cell angles 89 



77. Capsule erect and symmetric 78 



77. Capsule usually arcuate, unsymmetric 84 



78. Leaves costate, margins papillose-denticulate; cells pluripapillate; operculum 



conic-rostrate Rauia, p. 206 



78. Leaves costate, margin i:sually entire (see also Myurella) 79 



78. Leaves ecostate 83 



79. Costa not more than half the length of the leaf Haplohymenium, p. 197 



79. Costa strong in our species, nearly reaching the apex of the leaf 80 



80. Primary stems stoioniform, secondary stems bearing the sporophytes; stem- 

 leaves minute; paraphyllia none Anomodon, p. 198 



80. Primary stems bearing the sporophytes and not stoioniform; branch and 



stem leaves not markedly dissimilar; paraphyllia often present 81 



81. Paraphyllia none; leaf-cells compact, oval-oblong to round-hexagonal, nearly 



smooth; cilia none; teeth not hygroscopic; dioicous Leskeella. p. 205 



81. Paraphyllia usually present; leaf-cells hexagonal to parenchymatous, mostly 



unipapillate: autoicous - 82 



