INTRODUCTION. 



V 



i, ^ 



xliii 



XXXIII 



s 



FESTUCA elatior. 



Tall Fescue-^m^^. 



Diseased 



and 



; 



-Abortive 



\ 





The seed of this grass is always either diseased 



abort 



mens. The form of the seed-vessel 



the Festuca pratemis, (N 



^ 



abortive seed 



tween the fingers : it feels like 



3 above 



XVII.), but may b 



a mere husk 



ve, as shewn in the above speci- 

 scarcely to be distinguished from that of 

 distinguished with certainty by passing it be- 



^y 



n comparin 



th 



; and the diseased seed may be perceived by the 

 specuuens with those of the Festuca pratensis, (No. XVII ) 

 the ^seed-vessel appears mor^ elongated and compressed, which evidently arises from the absence 



of the Festuca pratensis appears to be always free from 



of the body of the seed 

 disease 



Th 



XXXIT. 



BROMU^ 



arvensis. 



Field 



, or Corn Brome-^rc^^^ 



/ 



r- 



'. 



rhis seed is distinguished from that of Bromus mollis 



being sharp-pointed 

 hereafter, and it 

 Bromus mollis, a 



This is one of the best of the annual brome 



by being longer, more slender, and 



therefore of importance that 



will 



e snewn 



very troublesome weed 



its seed should be known from that of th 



V * 



m 



