XXXV111 KEY TO THE GENERA. 



J. Capsule smooth, erect, peristome teeth 4-16, nearly 



simple. 



/Peristome teeth 4 only .j>. Tetraphis 



\ Peristome teeth 1 6 2 



/Leaves wide, with long, very lax cells 3 



\ Cells short, or elongate and narrow 4 



{Leaves strongly serrate, or entire and very obtuse .JS- Tayloria 

 Leaves almost entire, acute 6i. Funaria 



/Peristome teeth strongly paired, reflexed when dry 33. Glyphomitrium 



^Peristome teeth not paired 5 



/Leaves subulate, smooth ; growing on stones or rocks 6 



-"^Leaves more or less lanceolate, or wider, usually papillose 7 



,/Plant minute ; angular cells of leaves not coloured 13. Seligeria 



\ Plant larger ; angular cells distinct, brownish 22. Blindia 



/Nerve excurrent (or leaves wide-ovate, obtuse, very concave) 8 



' \ Nerve ceasing in or below apex 10 



a /Capsule long, cylindric ; Is. large, with large multifid papillae 46. Encalypta 



\ Capsule shorter, oval; Is. smooth, or with smaller papillae 9 



/Leaves ovate-lanceolate, ovate, or obovate 38. Pottia 



"\ Leaves linear-lanceolate or lanceolate 42. Weisia 



/Ls. blackish-green, opaque, bistratose above (alpine rocks) 29. Grimmia 



\Ls. not bistratose 11 



{Ls. wide at apex, serrate above 41. Leplodo7itium 

 Ls. narrowed towards apex, almost entire 12 



f Perichsetial ls. distinct, sheathing; ls. more or less coloured at angles 



I2-! 23. Dicranoweisia 

 (^Perichsetial ls. not distinct ; angles not coloured 40. Barbula 



K. Capsule smooth, erect, peristome teeth 16, deeply- 

 divided, or 32 (acrocarpous.) 



{Peristome twisted 2 

 Peristome straight 4. 



/Ls. oblong or obovate, or covered with granular filaments .39. Tortula 



\Ls. more or less tapering in upper half, without granular filaments 3 



(Ls. usually short, or with recurved margins ; hyaline cells not ascending up 

 margin 40. Barbula 

 Ls. very long and narrow, with plane margins ; basal hyaline cells ascending up 

 margin 43. Trichostomum 



/Basal cells long, narrow, nodulose 30. Rhacomitrium 



4\Basal cells not nodulose c 



/Plant small, glaucous-green ; among alpine rocks 75. Salania 



-> \Plant not glaucous g 



,/Upper cells elongate y 



\Upper cells short, usually more or less quadrate g 



/Nerve excurrent in the narrow subula n % Ditrichum 



"\Nerve ceasing below apex ZI _ Dicranetta 



(■Nerve excurrent, angular cells brownish ; peristome teeth divided half-way... 

 gj 26. Dicranum 

 j Nerve not excurrent, angular cells not coloured ; peristome teeth usually divided 

 I. nearly to base n 



{Leaves more or less toothed above ... 10 

 Leaves entire (unless at extreme apex) t j 



/Leaves plicate 32 . Ptychomitrium 



\ Leaves not plicate 7 & Cynodontium 



[ Leaf-margin recurved ; nerve not excurrent ^o. Barbula 



1 1 -j Leaf-margin plane or incurved; nerve excurrent (except tenuirostre) 



I 43. Trichostomum 



