COMPATlATrVE ANALYSTS. 



2 on 



4. Florets obscurely ribbed, paniele sorrKs-u-bat drooping 

 Florets five -ribbed, panicle not drooping . 



o. Ligulcs lanceolate 



Ligules short and truncate 



G. Culm and sbcatli smooth, root creeping 

 Culm and sheath rough, root fibrous 



7. Ligules short and trancate, panicle somewhat drooping 

 Upper ligule oblong, acute, panicle not drooping 



8. Stem spreading, procumbent at the base 



Stem nearly erect .... 



Teiodta. 

 Ligule, a tuft of hairs 



Bkiza. 

 Glumes longer than the florets, ligule lanceolate 

 Glumes shorter than the florets, ligule very short 



Panicle secund , 



Spike ovate 

 Spike linear 



Dactylis. 



Cynosurus. 



Festttca. 



Bromu 



1. Glume one .... 

 Glumes two 



2. Leaves auriclcd 

 Leaves not auricled 



3. Florets monandrous, shorter than their awns 

 Florets triandrous, awnlcss, or as long as their awns 



4. Culm leafy in its upper part 



Culm leafless above .... 

 o. Raceme spiked .... 



Panicle branched .... 

 G. 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. Root fibrous .... 

 Root creeping .... 



10. Spikelcts not more than five-flowered 

 Spikelets more than five-flowered 



5 



6 



Laxa. 



jVe7noralu. 



Pratensis. 



Trivtalis. 



JVemoralis. 



8 

 . Annua. 

 Alpina. 



Beciimbens. 



Minor. 

 Iledia. 



Glomerata. 



Echinatus. 

 Cristatus. 



Unigluinis. 

 2 

 s giganteus. 

 3 

 4 

 o 

 . jLjurm. 

 Uromoides. 

 Loliacea. 

 6 

 7 

 . 10 

 8 

 9 



Oa'na. 



Viiijjara. 



Duriuscula. 



Rubra. 



Calamaria. 



11 



