xl KEY TO THE GENERA. 



/Ls. very short, roundish, obtuse; branches rolled up when dry 96. Leptodon 



■* \ Ls. not roundish 4 



/Leaves with long curved papilla: on back ; cells elongate .. 97. Pterigynandrum 



4 \. Leaves with short papilla:; cells short, quadrate or roundish 5 



, / Stem stoloniform, with ascending branches 95- Anomodon 



5 \Stemnotstoloniform 94- Leskea 



, /Stem slender, prostrate, not dendroid; Is. acuminate 106. Lescuma 



\ Stem robust, dendroid; ls. obtuse or shortly pointed 7 



/ Leaves serrate, plicate, obtuse I01 - Clunacium 



' \ Leaves serrulate only, not plicate, acute or sub-acute 107. Isothecium 



O. Capsule eernuous, pleuroearpous (leaves nerved). 



/Leaves papillose 

 \ Leaves smooth . . , 



2 



'.'.'.'.'.'.'.'..'. .-3 



/Stem markedly pinnate or bipinnate 100. Thuidium 



2 \ Stem irregularly branched 99- Pseudoleskea 



/Cells very small, roundish ; stem dendroid 92. Porotrichum 



^\ Cells more or less elongate 4 



/Leaves strongly complanate, obtuse or very shortly apiculate 83. Homalia 



4\Leaves not or laxly complanate, and if so acute 5 



/Seta very short, usually curved ; ls. with recurved teeth at apex... 91. Antitrichia 



^ \ Seta longer ; ls. without recurved teeth 6 



, / Lid longly rostrate tie. Eurhynchium 



\Lid not longly rostrate 7 



/Capsule short, swollen no. Brachythecium 



'\Capsule more or less cylindric, usually curved 8 



o/Cells about 3-5 times as long as wide 114. Amblystegium 



\Cells much elongate 9 



/Ls. lanceolate, with long narrow acumen, plicate, imbricate. .109. Camptothecium 

 "\Ls., if acuminate, either secund or squarrose iij. Hypnum 



P. Leaves nerveless op shortly 2-nerved, with short 

 cells (at least at the sides). 



/Leaves strongly plicate when moist, acuminate 87. Leucodon 



\Leaves not (or only very slightly) plicate when moist 2 



/Plant rather robust, leaves over \ line long 3 



\Plant very slender, leaves under \ line long 4 



( Leaves serrate above, margin plane 88. Pterogonium 



-*\ Leaves entire, margin recurved yj. Hedwigia 



/Leaves finely serrulate, usually papillose 98. Heterocladium 



4 \Leaves entire 5 



{Leaves acuminate, sub-squarrose, smooth 89. Habrodon 

 Leaves not acuminate, more or less imbricate 6 



,/ Leaves sub-acute, smooth go. Myrinia 



\Leaves obtuse or apiculate, more or less papillose gj. Myurella 



Q. Leaves nerveless or 2-nerved, with elongated cells. 



/Leaves complanate, or 3-ranked, or uniformly falcato-secund 2 



\Leaves all round the stem, or subsecund only 6 



I Cells very lax, over 50 /i wide ; ls. complanate, obtuse 86. Pterygophyllum 



\Cells narrow , 



/Leaves falcato-secund 7/J -. Hypium 



* \ Leaves not distinctly secund 



