18 ALOPECURUS GENICULATU8. 



in A. fulvus anthers short, and awn commencing below the centre, 

 and not extending beyond the palea. 



A. geniculatus has a smooth stem, whilst in A. agrestis it is rough. 



In A. alpinus panicle short, whilst in A. geniculatus it is long. 



In A. pratensis upper sheath more than twice the length of its leaf, 

 whilst in A. geniculatus only of same length as its leaf. 



This species is subject to variety. 



My thanks are due to Dr. "Wilson, of Nottingham, and to Mr. Joseph 

 Sidebotham, of Manchester, for specimens. 



The illustration is from Dr. Wilson's specimen, which was gathered 

 in Cheshire. 



