BY L. RODWAY. 89 



Group A. Leaves small, rigid, erect, entire 

 or emarginate, not derurved trlien frcdi nor rriniip/ed 

 irhen dry. 



1. Trigones large 2 



Trigones minute 4 



2. Underleaves relatively large free 3 



Undei'leaves verv small connate ... c ic'i [luhita 



3. Very small green, underleaves bifid 



(DK/Ul ixfi pidd 



Leaves 2 mm., underleaves subcucul- 



late, regularlv denticulate fit mi da 



4. Underleaves nearly as large as the 



leaves, l-3rd bifid novde-zchindUte 



Underleaves very small 5 



5. Underleaves free ddrf/onia 



Underleaves connate with leaves ... e id puhiffi 



Group B. Leaves medium to large, cr('ct ir/th a 

 more or less derurnd ape'\ rotund to triangular, entire 

 or rarely retuse, or some leaves slightly bidentate, or 

 in some species the margin slightly armed. 



1. Leaf margin always plain strongly 



clecurved 2 



Leaf margin often armed, apex not 

 strongly decurved 6 



2. Leaf at least as long as its base 3 



Base of leaf exceeding its length 4 



3. Underleaves narrow, deeply bifid ranaliciilatfi 

 Underleaves mostly 4 -fid. ... htterop]nfUo{de'< 

 Underleaves oblong-rotund, shortly 



bifid cord if oil us 



4. Leaf ovate-rotund (junniana 



Leaf more or less retuse 5 



5. Trigones none for.sijtltiana 



Trigones medium acute (/eheehii 



6. Leaves mostly under 1 mm. long... hiuterhachii 

 Leaves exceeding 2 mm 7 



7. Leaves reniform erect crowded rupiada 



Leaves ovate-triangular subplano- 



distichous fissisfipu h/ 



Group C. Leaves mostly ovate-triangular, apex 

 more or less retuse, sometimes rotund or a few leaves 

 bifid, medium to large, erect or decurved, but flaccid 

 and cm m pled wl^en dry. 

 1. Underleaves relatively large, seldom 

 deeply bifid, margin with small teeth 

 or entire 2 



