xlii KEY TO THE GENERA. 



T. Cells wide, 20 m op more in their shortest diameter. 



/Cells short, quadrate or roundish 



\ Cells elongate - 



2 /Nerve excurrent 3 8 - P ott ^ 



\ Nerve vanishing below apex - 



/Leaves serrate 7 8 Mnium 



**\ Leaves entire < ^ 



f Leaves very large, roundish J 2 - CEdipodium 



4 \Leaves oblong S°- Orthotruhum 



/Cells mostly with pointed ends ■ ' 



5\Cells flattened at the ends (or leaves large, wide, and flaccid) = 



,/Ls. small, closely imbricate, green or pinkish 7 6 - Plagiobryum 



\Ls. rarely imbricate, or imbricate and silvery white 7 



/Ls. usually narrow, nerve not reaching apex * 75- Webera 



'\Ls. usually wider, nerve often reaching apex or excurrent * 77- Bryum 



„| Leaves ending in long 6ne points -54- Tetraplodon 



\ Leaves without such points 5 



/Leaves obtuse and entire Ic 



" \ Leaves acute J * 



/Leaves ovate or roundish -S3- Splachnum 



I0 \Leaves Ungulate -55- Tayloria 



/ Leaves narrow, serrate near apex 62. Amblyodon 



\ Leaves wide, ovate or obovate ** 61. Funaria, &-'c. 



U. Leaves obtuse and entire, or bluntly apiculate. 



{Basal cells long and narrow, strongly nodulose 30. Rhacomitriun, 

 Basal cells not nodulose, at most sinuose only 2 



/ Upper cells short, more or less quadrate or roundish 1 



\ Upper cells elongate ic 



/Branches pinnate or bipinnate, rolled up closely when dry 96. Leptodor, 



'\Branches not rolled up when dry 4 



/Leaves narrow, very short, not \ line long 42. Weisic 



4 \ Leaves over £ line long t 



/Ls. pale, yellowish, pellucid; upper cells sinuose 65. Aulacomnium 



->\Ls. dark -green, more or less opaque ; cells not sinuose (except Grimmia) ( 



,/ Leaves obovate-spathulate jg. Tortuk 



\ Leaves more or less ovate or lanceolate ; 



fStem stoloniform, much interlaced, with erect branches jy. Anomodot, 



' \ Stem not stoloniform i 



„/ Leaves over two lines long, with course mullifid papillae 46. Eucalypti 



\ Leaves under two lines long < 



/Cells quadrate, sometimes sinuose 29. Grimmii 



9 \Cells rounded .30. Orthotrichun 



I0 (Leaves strongly squarrose-recurved 21. Dicranelh 



\ Leaves not markedly squarrose \\ 



/Cells with flattened ends ; ls. narrow-lingulate 63. Meesic 



\ Cells with pointed or overlapping ends 1; 



fLeaves very large (over 2 lines), roundish yg. Mniun 



\ Leaves smaller j. 



/ Plant acrocarpous, erect ; cells usually rather wide yy. Bryuv 



6 \ Plant pleurocarpous, rarely erect ; cells very narrow 115. Hypnun 



* See also under IVebera, p. 302. 



** This would include several species of Physcomitrium, Fmiaria, Splachnum, and Tayloiia 



hardly to be identified by a Key in the absence of fruit. 



