COMPARATIVE ANALYSIS. 



233 



Cynosfrus. 



4. Florets obscurely ribbed, panicle somewhat drooping 

 Florets five-ribbed, panicle not drooping 



5. Ligules lanceolate 

 Ligules short and truncate 



6. Culm and sheath smooth, root creeping 

 Culm and sheath rough, root fibrous 



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 



Triodia. 

 Ligule, a tuft of hairs 



Briza. 



Glumes longer than the florets, ligule lanceolate 

 Glumes shorter than the florets, ligule very short . 



Dactylis. 

 Panicle seeund . 



Spike ovate . . . • 



Spike linear 



Festuca. 



1. Glume one .... 

 Glumes two 



2. Leaves auricled 

 Leaves not auricled 



3. Florets monandrous, shorter than their awns 

 Florets triandrous, awnless, or as long as their awns 



4. Culm leafy in its upper part 

 Culm leafless above 



5. Eaceme spiked 

 Panicle branched .... 



6. Lower leaves setaceous or involute, pedicels naked 

 Leaves linear, pedicels tufts of hair at end 



7. Culm square, not a foot high 

 Culm round .... 



8. Florets awned or pointed, edge of inner valve glabrous 

 Florets awnless, edge of inner valve downy 



9. Eoot fibrous .... 

 Eoot creeping .... 



.5 

 6 



Laxa. 



Nemoralis. 



Pratcnsis. 



Trivialis. 



Nemoralis. 



8 

 . Annua. 

 Alpina. 



Decumbens. 



Minor. 

 Media. 



Glomerata. 



Ech'natus. 

 Crist atus. 



10. Spikelets not more than five-flowered 

 Spikelets more than five-flowered 



Uniglumis. 



2 

 Bromus giganteus. 

 3 

 4 

 5 

 Myurus. 

 Bromoides. 

 Loliacea. 

 6 

 7 

 . 10 

 8 

 9 

 Ovina. 

 Vivipara. 

 Duriuscula. 

 Bubra. 

 Calamaria. 

 11 



