OF THE SPECIES. 



Gtnera. -V^i"- 



(' Twice the width of the outer palea conaderablv 



] more than the length of the palea Bromus secalinus. 



I Twice the width of the outer palea equal to the 



I length of the palea Bromus arveiisii. 



, Awns of the florets much longer than the calvx. 5. 

 *' ) Awns of the florets much shorter than the calj-x. 6. 



Spikelets drooping. Awns longer than the flo- 



.Bromm sterilis. 



Spikelets erect. Awns equal in length to the 



gQPgts Bromus diandrus. 



XXI 



Plate. 

 49 

 49 



Festuca. 



Lower floret about one-third longer than the 



smaU glume ^''O"'^^ ^^f^"^- 



■* Lower floret twice the length of the small 



l^ glume. 



.Bromus asper. 



d Radical leaves hairy 1- 



< Radical leaves not hairv Trisetum pratense. 



\ Ligule long and acute TrUetum pxibescen^. 



\ Ligule very short and obtuse Trisetum flavescem. 



\ Awns much longer than the florets. 

 ( Awns much shorter than the florets. 



Festuca hromoides. 

 1. 



\ Root fibrous. Stem under the panicle rough... J^'esfwm Orvina. 



\ Root creeping. Stem under the panicle smooth.i^'esfitca duriusdda. 



I Spikelets long, on short footstalks Tritkum syhaticum. 



I Spikelets short without footstalks 1- 



Stem rough... 

 Stem smooth. 



.Triticum cristatum. 



Awns rather longer than the florets. Triticum caninum. 



Awns ver}- short or wanting 3. 



,Rachis rough Triticum repent 



1 Rachis smooth Triticum juvceum. 



.Elymus arenarivs. 



c Florets awned. Glume longer than the spikeletioZtam temulcntum. 

 LoLiv.M. J Florets not awned. Glume shorter than the 



( gpikelet JLolium pereniic. 



