COMPARATIVE ANALYSIS. 



7. Ligules short and truncate, panicle somewhat drooping 

 Upper ligule oblong, acute, panicle not drooping 



8. Stem spreading, procumbent at the base 

 Stem nearly erect 



Ligule, a tuft of hairs 



TEIODIA. 



BRIZA. 



G-lumes longer than the florets, ligule lanceolate 

 G-lumes shorter than the florets, ligule very short 



Panicle secund 



Spike ovate 

 Spike linear 



DACTYLIS. 

 CYNOSTTBUS. 



2. 



4. 



6. 



6. 



7. 



10. 



11. 



1. 



FESTPCA. 



Glume one . . . 



Glumes two . . . 



Leaves auricled . . 



Leaves not auricled . . ... 



Florets monandrous, shorter than their awns 

 Florets triandrous, awnless, or as long as their awns 

 Culm leafy in its upper part . . 



Culm leafless above 



Raceme spiked .... 



Panicle branched .... 

 Lower leaves setaceous or involute, pedicels naked 

 Leaves linear, pedicels tufts of hair at end 

 Culm square, not a foot high 

 Culm round .... 



Florets awned or pointed, edge of inner valve glabrous 

 Florets awnless, edge of inner valve downy 

 Eoot fibrous ..... 

 Root creeping .... 



Spikelets not more than five-flowered 

 Spikelets more than five-flowered 

 Panicle much branched, root creeping 

 Panicle not much branched, root fibrous 



BROMTJS. 



Stamens two 

 Stamens three 



Nemoralis. 



8 



Annua. 

 . Alpina. 



Decumbens. 



Minor. 



Media. 



Glomerata. 



Eehinatus. 

 Cristaim. 



Uniglumis. 



2 



Bromus yiganteua. 

 3 

 4 

 5 



. Myurus. 

 Bromoides. 

 Loliacea. 

 6 

 7 



10 

 8 

 9 



Ovina. 



Vivipara. 



Duriuscula. 



Ruhr a, 



Calamaria. 



11 



Diandrus. 

 Pratensis. 



Diandrus. 

 2 



2 H 



